Datrys sqrt{6*0.807+6*0.781/12}

$$\sqrt{ \frac{ 6 \times 0.807+6 \times 0.781 }{ 12 } }$$

Enrhifo

$$\frac{\sqrt{1985}}{50}\approx 0.891066776$$

Camau Ateb

Lluosi 6 a 0.807 i gael 4.842.

$$\sqrt{\frac{4.842+6\times 0.781}{12}}$$

Lluosi 6 a 0.781 i gael 4.686.

$$\sqrt{\frac{4.842+4.686}{12}}$$

Adio 4.842 a 4.686 i gael 9.528.

$$\sqrt{\frac{9.528}{12}}$$

Ehangu \frac{9.528}{12} drwy luosi'r rhifiadur a'r enwadur gyda 1000.

$$\sqrt{\frac{9528}{12000}}$$

Lleihau'r ffracsiwn \frac{9528}{12000} i'r graddau lleiaf posib drwy dynnu a chanslo allan 24.

$$\sqrt{\frac{397}{500}}$$

Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{397}{500}} fel rhaniad ail israddau \frac{\sqrt{397}}{\sqrt{500}}.

$$\frac{\sqrt{397}}{\sqrt{500}}$$

Ffactora 500=10^{2}\times 5. Ailysgrifennu ail isradd y lluoswm \sqrt{10^{2}\times 5} fel lluoswm ail israddau \sqrt{10^{2}}\sqrt{5}. Cymryd isradd 10^{2}.

$$\frac{\sqrt{397}}{10\sqrt{5}}$$

Mae'n rhesymoli enwadur \frac{\sqrt{397}}{10\sqrt{5}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{5}.

$$\frac{\sqrt{397}\sqrt{5}}{10\left(\sqrt{5}\right)^{2}}$$

Sgwâr \sqrt{5} yw 5.

$$\frac{\sqrt{397}\sqrt{5}}{10\times 5}$$

I luosi \sqrt{397} a \sqrt{5}, dylid lluosi'r rhifau dan yr ail isradd.

$$\frac{\sqrt{1985}}{10\times 5}$$

Lluosi 10 a 5 i gael 50.

$$\frac{\sqrt{1985}}{50}$$