Datrys sqrt{20*10^-6*0.02*3+400*10^-12*10000}

$$\sqrt{ 20 \times { 10 }^{ -6 } \times 0.02 \times 3+400 \times { 10 }^{ -12 } \times 10000 }$$

Enrhifo

$$\frac{\sqrt{130}}{5000}\approx 0.002280351$$

Camau Ateb

Cyfrifo 10 i bŵer -6 a chael \frac{1}{1000000}.

$$\sqrt{20\times \frac{1}{1000000}\times 0.02\times 3+400\times 10^{-12}\times 10000}$$

Lluosi 20 a \frac{1}{1000000} i gael \frac{1}{50000}.

$$\sqrt{\frac{1}{50000}\times 0.02\times 3+400\times 10^{-12}\times 10000}$$

Lluosi \frac{1}{50000} a 0.02 i gael \frac{1}{2500000}.

$$\sqrt{\frac{1}{2500000}\times 3+400\times 10^{-12}\times 10000}$$

Lluosi \frac{1}{2500000} a 3 i gael \frac{3}{2500000}.

$$\sqrt{\frac{3}{2500000}+400\times 10^{-12}\times 10000}$$

Cyfrifo 10 i bŵer -12 a chael \frac{1}{1000000000000}.

$$\sqrt{\frac{3}{2500000}+400\times \frac{1}{1000000000000}\times 10000}$$

Lluosi 400 a \frac{1}{1000000000000} i gael \frac{1}{2500000000}.

$$\sqrt{\frac{3}{2500000}+\frac{1}{2500000000}\times 10000}$$

Lluosi \frac{1}{2500000000} a 10000 i gael \frac{1}{250000}.

$$\sqrt{\frac{3}{2500000}+\frac{1}{250000}}$$

Adio \frac{3}{2500000} a \frac{1}{250000} i gael \frac{13}{2500000}.

$$\sqrt{\frac{13}{2500000}}$$

Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{13}{2500000}} fel rhaniad ail israddau \frac{\sqrt{13}}{\sqrt{2500000}}.

$$\frac{\sqrt{13}}{\sqrt{2500000}}$$

Ffactora 2500000=500^{2}\times 10. Ailysgrifennu ail isradd y lluoswm \sqrt{500^{2}\times 10} fel lluoswm ail israddau \sqrt{500^{2}}\sqrt{10}. Cymryd isradd 500^{2}.

$$\frac{\sqrt{13}}{500\sqrt{10}}$$

Mae'n rhesymoli enwadur \frac{\sqrt{13}}{500\sqrt{10}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{10}.

$$\frac{\sqrt{13}\sqrt{10}}{500\left(\sqrt{10}\right)^{2}}$$

Sgwâr \sqrt{10} yw 10.

$$\frac{\sqrt{13}\sqrt{10}}{500\times 10}$$

I luosi \sqrt{13} a \sqrt{10}, dylid lluosi'r rhifau dan yr ail isradd.

$$\frac{\sqrt{130}}{500\times 10}$$

Lluosi 500 a 10 i gael 5000.

$$\frac{\sqrt{130}}{5000}$$