Datrys -(4)divsqrt{(4)^2-4+1(2)}

$$- ( 4 ) \div \sqrt { ( 4 ) ^ { 2 } - 4 + 1 ( 2 ) }$$

Enrhifo

$$-\frac{2\sqrt{14}}{7}\approx -1.069044968$$

Camau Ateb

Cyfrifo 4 i bŵer 2 a chael 16.

$$\frac{-4}{\sqrt{16-4+1\times 2}}$$

Tynnu 4 o 16 i gael 12.

$$\frac{-4}{\sqrt{12+1\times 2}}$$

Lluosi 1 a 2 i gael 2.

$$\frac{-4}{\sqrt{12+2}}$$

Adio 12 a 2 i gael 14.

$$\frac{-4}{\sqrt{14}}$$

Mae'n rhesymoli enwadur \frac{-4}{\sqrt{14}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{14}.

$$\frac{-4\sqrt{14}}{\left(\sqrt{14}\right)^{2}}$$

Sgwâr \sqrt{14} yw 14.

$$\frac{-4\sqrt{14}}{14}$$

Rhannu -4\sqrt{14} â 14 i gael -\frac{2}{7}\sqrt{14}.

$$-\frac{2}{7}\sqrt{14}$$