Datrys 3sqrt{32}-5sqrt{8}

$$3 \sqrt { 32 } - 5 \sqrt { 8 }$$

Enrhifo

$$2\sqrt{2}\approx 2.828427125$$

Camau Ateb

Ffactora 32=4^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{4^{2}\times 2} fel lluoswm ail israddau \sqrt{4^{2}}\sqrt{2}. Cymryd isradd 4^{2}.

$$3\times 4\sqrt{2}-5\sqrt{8}$$

Lluosi 3 a 4 i gael 12.

$$12\sqrt{2}-5\sqrt{8}$$

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}.

$$12\sqrt{2}-5\times 2\sqrt{2}$$

Lluosi -5 a 2 i gael -10.

$$12\sqrt{2}-10\sqrt{2}$$

Cyfuno 12\sqrt{2} a -10\sqrt{2} i gael 2\sqrt{2}.

$$2\sqrt{2}$$