Datrys sqrt{8}-(1-sqrt{2})

$$\sqrt { 8 } - ( 1 - \sqrt { 2 } )$$

Enrhifo

$$3\sqrt{2}-1\approx 3.242640687$$

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}.

$$2\sqrt{2}-\left(1-\sqrt{2}\right)$$

I ddod o hyd i wrthwyneb 1-\sqrt{2}, dewch o hyd i wrthwyneb pob term.

$$2\sqrt{2}-1-\left(-\sqrt{2}\right)$$

Gwrthwyneb -\sqrt{2} yw \sqrt{2}.

$$2\sqrt{2}-1+\sqrt{2}$$

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

$$3\sqrt{2}-1$$