Datrys 9sqrt{8}+4-9*sqrt{8}-4

$$9 \sqrt { 8 } + 4 - 9 \cdot \sqrt { 8 } - 4$$

Enrhifo

$$0$$

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}.

$$9\times 2\sqrt{2}+4-9\sqrt{8}-4$$

Lluosi 9 a 2 i gael 18.

$$18\sqrt{2}+4-9\sqrt{8}-4$$

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}.

$$18\sqrt{2}+4-9\times 2\sqrt{2}-4$$

Lluosi -9 a 2 i gael -18.

$$18\sqrt{2}+4-18\sqrt{2}-4$$

Cyfuno 18\sqrt{2} a -18\sqrt{2} i gael 0.

$$4-4$$

Tynnu 4 o 4 i gael 0.

$$0$$

Ffactor

$$0$$