Datrys (sqrt{2}+sqrt{8})^2

$$( \sqrt { 2 } + \sqrt { 8 } ) ^ { 2 }$$

Enrhifo

$$18$$

Camau Ateb

Ffactora 8=2^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{2^{2}\times 2} fel lluoswm ail israddau \sqrt{2^{2}}\sqrt{2}. Cymryd isradd 2^{2}.

$$\left(\sqrt{2}+2\sqrt{2}\right)^{2}$$

Cyfuno \sqrt{2} a 2\sqrt{2} i gael 3\sqrt{2}.

$$\left(3\sqrt{2}\right)^{2}$$

Ehangu \left(3\sqrt{2}\right)^{2}.

$$3^{2}\left(\sqrt{2}\right)^{2}$$

Cyfrifo 3 i bŵer 2 a chael 9.

$$9\left(\sqrt{2}\right)^{2}$$

Sgwâr \sqrt{2} yw 2.

$$9\times 2$$

Lluosi 9 a 2 i gael 18.

$$18$$

Ffactor

$$2\times 3^{2}$$