(a^{2}+1/2ab-2/5b^{2})-(b^2-3/7a^2+2ab)+(7/5b^2+frac{3}{2}ab-frac{10}{7}a^2)= eching

$$( a ^ { 2 } + \frac { 1 } { 2 } a b - \frac { 2 } { 5 } b ^ { 2 } ) - ( b ^ { 2 } - \frac { 3 } { 7 } a ^ { 2 } + 2 a b ) + ( \frac { 7 } { 5 } b ^ { 2 } + \frac { 3 } { 2 } a b - \frac { 10 } { 7 } a ^ { 2 } ) =$$

Baholash

$$0$$

Yechim qadamlari

b^{2}-\frac{3}{7}a^{2}+2ab teskarisini topish uchun har birining teskarisini toping.

$$a^{2}+\frac{1}{2}ab-\frac{2}{5}b^{2}-b^{2}+\frac{3}{7}a^{2}-2ab+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

-\frac{7}{5}b^{2} ni olish uchun -\frac{2}{5}b^{2} va -b^{2} ni birlashtirish.

$$a^{2}+\frac{1}{2}ab-\frac{7}{5}b^{2}+\frac{3}{7}a^{2}-2ab+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

\frac{10}{7}a^{2} ni olish uchun a^{2} va \frac{3}{7}a^{2} ni birlashtirish.

$$\frac{10}{7}a^{2}+\frac{1}{2}ab-\frac{7}{5}b^{2}-2ab+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

-\frac{3}{2}ab ni olish uchun \frac{1}{2}ab va -2ab ni birlashtirish.

$$\frac{10}{7}a^{2}-\frac{3}{2}ab-\frac{7}{5}b^{2}+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

0 ni olish uchun -\frac{7}{5}b^{2} va \frac{7}{5}b^{2} ni birlashtirish.

$$\frac{10}{7}a^{2}-\frac{3}{2}ab+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

0 ni olish uchun -\frac{3}{2}ab va \frac{3}{2}ab ni birlashtirish.

$$\frac{10}{7}a^{2}-\frac{10}{7}a^{2}$$

0 ni olish uchun \frac{10}{7}a^{2} va -\frac{10}{7}a^{2} ni birlashtirish.

$$0$$

Omil

$$0$$

Yechim qadamlari

\frac{1}{70} omili.

$$\frac{70a^{2}+35ab-28b^{2}-10\left(7b^{2}-3a^{2}+14ab\right)+98b^{2}+105ab-100a^{2}}{70}$$

Qisqartirish.

$$0$$