Datrys 160-200*0.7/sqrt{0.7*0.3*200}

$$\frac{ 160-200 \times 0.7 }{ \sqrt{ 0.7 \times 0.3 \times 200 } }$$

Enrhifo

$$\frac{10\sqrt{42}}{21}\approx 3.086066999$$

Camau Ateb

Lluosi 200 a 0.7 i gael 140.

$$\frac{160-140}{\sqrt{0.7\times 0.3\times 200}}$$

Tynnu 140 o 160 i gael 20.

$$\frac{20}{\sqrt{0.7\times 0.3\times 200}}$$

Lluosi 0.7 a 0.3 i gael 0.21.

$$\frac{20}{\sqrt{0.21\times 200}}$$

Lluosi 0.21 a 200 i gael 42.

$$\frac{20}{\sqrt{42}}$$

Mae'n rhesymoli enwadur \frac{20}{\sqrt{42}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{42}.

$$\frac{20\sqrt{42}}{\left(\sqrt{42}\right)^{2}}$$

Sgwâr \sqrt{42} yw 42.

$$\frac{20\sqrt{42}}{42}$$

Rhannu 20\sqrt{42} â 42 i gael \frac{10}{21}\sqrt{42}.

$$\frac{10}{21}\sqrt{42}$$