Datrys =sqrt{42*16*14*2}

$$= \sqrt { 42 \times 16 \times 14 \times 2 }$$

Enrhifo

$$56\sqrt{6}\approx 137.171425596$$

Camau Ateb

Lluosi 42 a 16 i gael 672.

$$\sqrt{672\times 14\times 2}$$

Lluosi 672 a 14 i gael 9408.

$$\sqrt{9408\times 2}$$

Lluosi 9408 a 2 i gael 18816.

$$\sqrt{18816}$$

Ffactora 18816=56^{2}\times 6. Ailysgrifennu ail isradd y lluoswm \sqrt{56^{2}\times 6} fel lluoswm ail israddau \sqrt{56^{2}}\sqrt{6}. Cymryd isradd 56^{2}.

$$56\sqrt{6}$$