Datrys sqrt{72}*2sqrt{80}

$$\sqrt { 72 } \times 2 \sqrt { 80 }$$

Enrhifo

$$48\sqrt{10}\approx 151.789327688$$

Camau Ateb

Ffactora 72=6^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{6^{2}\times 2} fel lluoswm ail israddau \sqrt{6^{2}}\sqrt{2}. Cymryd isradd 6^{2}.

$$2\times 6\sqrt{2}\sqrt{80}$$

Lluosi 2 a 6 i gael 12.

$$12\sqrt{2}\sqrt{80}$$

Ffactora 80=4^{2}\times 5. Ailysgrifennu ail isradd y lluoswm \sqrt{4^{2}\times 5} fel lluoswm ail israddau \sqrt{4^{2}}\sqrt{5}. Cymryd isradd 4^{2}.

$$12\sqrt{2}\times 4\sqrt{5}$$

Lluosi 12 a 4 i gael 48.

$$48\sqrt{2}\sqrt{5}$$

I luosi \sqrt{2} a \sqrt{5}, dylid lluosi'r rhifau dan yr ail isradd.

$$48\sqrt{10}$$