ដោះស្រាយ (1/2x-2/3y+3/4)*(1/2x+frac{2}{3}y-frac{3}{4})=

$$( \frac { 1 } { 2 } x - \frac { 2 } { 3 } y + \frac { 3 } { 4 } ) \cdot ( \frac { 1 } { 2 } x + \frac { 2 } { 3 } y - \frac { 3 } { 4 } ) =$$

វាយតម្លៃ

$$-\frac{\left(8y-9\right)^{2}}{144}+\frac{x^{2}}{4}$$

ជំហានចម្លើយ

អនុវត្ត​លក្ខណៈបំបែកដោយគុណតួនីមួយៗនៃ \frac{1}{2}x-\frac{2}{3}y+\frac{3}{4} នឹងតួនីមួយៗនៃ \frac{1}{2}x+\frac{2}{3}y-\frac{3}{4}។

$$\frac{1}{2}x\times \frac{1}{2}x+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y\times \frac{2}{3}y-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ x និង x ដើម្បីបាន x^{2}។

$$\frac{1}{2}x^{2}\times \frac{1}{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y\times \frac{2}{3}y-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ y និង y ដើម្បីបាន y^{2}។

$$\frac{1}{2}x^{2}\times \frac{1}{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{1}{2} ដង \frac{1}{2} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1\times 1}{2\times 2}x^{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{1\times 1}{2\times 2}។

$$\frac{1}{4}x^{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{1}{2} ដង \frac{2}{3} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1\times 2}{2\times 3}xy+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

សម្រួល 2 ទាំងនៅក្នុងភាគយក និងភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{1}{2} ដង -\frac{3}{4} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy+\frac{1\left(-3\right)}{2\times 4}x-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{1\left(-3\right)}{2\times 4}។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy+\frac{-3}{8}x-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ប្រភាគ\frac{-3}{8} អាចសរសេរជា -\frac{3}{8} ដោយការស្រងចេញសញ្ញាអវិជ្ជមាន។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ -\frac{2}{3} ដង \frac{1}{2} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x+\frac{-2}{3\times 2}yx-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{-2}{3\times 2}។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x+\frac{-2}{6}yx-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

កាត់បន្ថយប្រភាគ \frac{-2}{6} ទៅតួដែលតូចបំផុតដោយ​ដក និងលុបចេញ 2។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x-\frac{1}{3}yx-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

បន្សំ \frac{1}{3}xy និង -\frac{1}{3}yx ដើម្បីបាន 0។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ -\frac{2}{3} ដង \frac{2}{3} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{3}{8}x+\frac{-2\times 2}{3\times 3}y^{2}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{-2\times 2}{3\times 3}។

$$\frac{1}{4}x^{2}-\frac{3}{8}x+\frac{-4}{9}y^{2}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ប្រភាគ\frac{-4}{9} អាចសរសេរជា -\frac{4}{9} ដោយការស្រងចេញសញ្ញាអវិជ្ជមាន។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ -\frac{2}{3} ដង -\frac{3}{4} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{-2\left(-3\right)}{3\times 4}y+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{-2\left(-3\right)}{3\times 4}។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{6}{12}y+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

កាត់បន្ថយប្រភាគ \frac{6}{12} ទៅតួដែលតូចបំផុតដោយ​ដក និងលុបចេញ 6។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{3}{4} ដង \frac{1}{2} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3\times 1}{4\times 2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{3\times 1}{4\times 2}។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3}{8}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

បន្សំ -\frac{3}{8}x និង \frac{3}{8}x ដើម្បីបាន 0។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{3}{4} ដង \frac{2}{3} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3\times 2}{4\times 3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

សម្រួល 3 ទាំងនៅក្នុងភាគយក និងភាគបែង។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{2}{4}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

កាត់បន្ថយប្រភាគ \frac{2}{4} ទៅតួដែលតូចបំផុតដោយ​ដក និងលុបចេញ 2។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{1}{2}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

បន្សំ \frac{1}{2}y និង \frac{1}{2}y ដើម្បីបាន y។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{3}{4} ដង -\frac{3}{4} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y+\frac{3\left(-3\right)}{4\times 4}$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{3\left(-3\right)}{4\times 4}។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y+\frac{-9}{16}$$

ប្រភាគ\frac{-9}{16} អាចសរសេរជា -\frac{9}{16} ដោយការស្រងចេញសញ្ញាអវិជ្ជមាន។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y-\frac{9}{16}$$

ពន្លាត

$$\frac{x^{2}}{4}-\frac{4y^{2}}{9}+y-\frac{9}{16}$$

ជំហានចម្លើយ

អនុវត្ត​លក្ខណៈបំបែកដោយគុណតួនីមួយៗនៃ \frac{1}{2}x-\frac{2}{3}y+\frac{3}{4} នឹងតួនីមួយៗនៃ \frac{1}{2}x+\frac{2}{3}y-\frac{3}{4}។

$$\frac{1}{2}x\times \frac{1}{2}x+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y\times \frac{2}{3}y-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ x និង x ដើម្បីបាន x^{2}។

$$\frac{1}{2}x^{2}\times \frac{1}{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y\times \frac{2}{3}y-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ y និង y ដើម្បីបាន y^{2}។

$$\frac{1}{2}x^{2}\times \frac{1}{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{1}{2} ដង \frac{1}{2} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1\times 1}{2\times 2}x^{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{1\times 1}{2\times 2}។

$$\frac{1}{4}x^{2}+\frac{1}{2}x\times \frac{2}{3}y+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{1}{2} ដង \frac{2}{3} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1\times 2}{2\times 3}xy+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

សម្រួល 2 ទាំងនៅក្នុងភាគយក និងភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy+\frac{1}{2}x\left(-\frac{3}{4}\right)-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{1}{2} ដង -\frac{3}{4} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy+\frac{1\left(-3\right)}{2\times 4}x-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{1\left(-3\right)}{2\times 4}។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy+\frac{-3}{8}x-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ប្រភាគ\frac{-3}{8} អាចសរសេរជា -\frac{3}{8} ដោយការស្រងចេញសញ្ញាអវិជ្ជមាន។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x-\frac{2}{3}y\times \frac{1}{2}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ -\frac{2}{3} ដង \frac{1}{2} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x+\frac{-2}{3\times 2}yx-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{-2}{3\times 2}។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x+\frac{-2}{6}yx-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

កាត់បន្ថយប្រភាគ \frac{-2}{6} ទៅតួដែលតូចបំផុតដោយ​ដក និងលុបចេញ 2។

$$\frac{1}{4}x^{2}+\frac{1}{3}xy-\frac{3}{8}x-\frac{1}{3}yx-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

បន្សំ \frac{1}{3}xy និង -\frac{1}{3}yx ដើម្បីបាន 0។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{2}{3}y^{2}\times \frac{2}{3}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ -\frac{2}{3} ដង \frac{2}{3} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{3}{8}x+\frac{-2\times 2}{3\times 3}y^{2}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{-2\times 2}{3\times 3}។

$$\frac{1}{4}x^{2}-\frac{3}{8}x+\frac{-4}{9}y^{2}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ប្រភាគ\frac{-4}{9} អាចសរសេរជា -\frac{4}{9} ដោយការស្រងចេញសញ្ញាអវិជ្ជមាន។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}-\frac{2}{3}y\left(-\frac{3}{4}\right)+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ -\frac{2}{3} ដង -\frac{3}{4} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{-2\left(-3\right)}{3\times 4}y+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{-2\left(-3\right)}{3\times 4}។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{6}{12}y+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

កាត់បន្ថយប្រភាគ \frac{6}{12} ទៅតួដែលតូចបំផុតដោយ​ដក និងលុបចេញ 6។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3}{4}\times \frac{1}{2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{3}{4} ដង \frac{1}{2} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3\times 1}{4\times 2}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{3\times 1}{4\times 2}។

$$\frac{1}{4}x^{2}-\frac{3}{8}x-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3}{8}x+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

បន្សំ -\frac{3}{8}x និង \frac{3}{8}x ដើម្បីបាន 0។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3}{4}\times \frac{2}{3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{3}{4} ដង \frac{2}{3} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{3\times 2}{4\times 3}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

សម្រួល 3 ទាំងនៅក្នុងភាគយក និងភាគបែង។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{2}{4}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

កាត់បន្ថយប្រភាគ \frac{2}{4} ទៅតួដែលតូចបំផុតដោយ​ដក និងលុបចេញ 2។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+\frac{1}{2}y+\frac{1}{2}y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

បន្សំ \frac{1}{2}y និង \frac{1}{2}y ដើម្បីបាន y។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y+\frac{3}{4}\left(-\frac{3}{4}\right)$$

គុណ \frac{3}{4} ដង -\frac{3}{4} ដោយការគុណភាគយក​ចំនួនដងនៃភាគយក និងភាគបែងចំនួនដងនៃភាគបែង។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y+\frac{3\left(-3\right)}{4\times 4}$$

ធ្វើផល​គុណនៅក្នុងប្រភាគ \frac{3\left(-3\right)}{4\times 4}។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y+\frac{-9}{16}$$

ប្រភាគ\frac{-9}{16} អាចសរសេរជា -\frac{9}{16} ដោយការស្រងចេញសញ្ញាអវិជ្ជមាន។

$$\frac{1}{4}x^{2}-\frac{4}{9}y^{2}+y-\frac{9}{16}$$