Datrys D*sqrt{8/125}

$$D \cdot \sqrt { \frac { 8 } { 125 } }$$

Enrhifo

$$\frac{2\sqrt{10}D}{25}$$

Camau Ateb

Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{8}{125}} fel rhaniad ail israddau \frac{\sqrt{8}}{\sqrt{125}}.

$$D\times \frac{\sqrt{8}}{\sqrt{125}}$$

Ffactora 8=2^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{2^{2}\times 2} fel lluoswm ail israddau \sqrt{2^{2}}\sqrt{2}. Cymryd isradd 2^{2}.

$$D\times \frac{2\sqrt{2}}{\sqrt{125}}$$

Ffactora 125=5^{2}\times 5. Ailysgrifennu ail isradd y lluoswm \sqrt{5^{2}\times 5} fel lluoswm ail israddau \sqrt{5^{2}}\sqrt{5}. Cymryd isradd 5^{2}.

$$D\times \frac{2\sqrt{2}}{5\sqrt{5}}$$

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

$$D\times \frac{2\sqrt{2}\sqrt{5}}{5\left(\sqrt{5}\right)^{2}}$$

Sgwâr \sqrt{5} yw 5.

$$D\times \frac{2\sqrt{2}\sqrt{5}}{5\times 5}$$

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

$$D\times \frac{2\sqrt{10}}{5\times 5}$$

Lluosi 5 a 5 i gael 25.

$$D\times \frac{2\sqrt{10}}{25}$$

Mynegwch D\times \frac{2\sqrt{10}}{25} fel ffracsiwn unigol.

$$\frac{D\times 2\sqrt{10}}{25}$$

Gwahaniaethu w.r.t. D

$$\frac{2 \sqrt{10}}{25} = 0.2529822128134704$$