Datrys 51/56*sqrt{5/98}

$$\frac { 51 } { 56 } \times \sqrt { \frac { 5 } { 98 } }$$

Enrhifo

$$\frac{51\sqrt{10}}{784}\approx 0.205709389$$

Camau Ateb

Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{5}{98}} fel rhaniad ail israddau \frac{\sqrt{5}}{\sqrt{98}}.

$$\frac{51}{56}\times \frac{\sqrt{5}}{\sqrt{98}}$$

Ffactora 98=7^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{7^{2}\times 2} fel lluoswm ail israddau \sqrt{7^{2}}\sqrt{2}. Cymryd isradd 7^{2}.

$$\frac{51}{56}\times \frac{\sqrt{5}}{7\sqrt{2}}$$

Mae'n rhesymoli enwadur \frac{\sqrt{5}}{7\sqrt{2}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{2}.

$$\frac{51}{56}\times \frac{\sqrt{5}\sqrt{2}}{7\left(\sqrt{2}\right)^{2}}$$

Sgwâr \sqrt{2} yw 2.

$$\frac{51}{56}\times \frac{\sqrt{5}\sqrt{2}}{7\times 2}$$

I luosi \sqrt{5} a \sqrt{2}, dylid lluosi'r rhifau dan yr ail isradd.

$$\frac{51}{56}\times \frac{\sqrt{10}}{7\times 2}$$

Lluosi 7 a 2 i gael 14.

$$\frac{51}{56}\times \frac{\sqrt{10}}{14}$$

Lluoswch \frac{51}{56} â \frac{\sqrt{10}}{14} drwy luosi'r rhifiadur â’r rhifiadur a'r enwadur â’r enwadur.

$$\frac{51\sqrt{10}}{56\times 14}$$

Lluosi 56 a 14 i gael 784.

$$\frac{51\sqrt{10}}{784}$$