Enrhifo
\frac{14\sqrt{10}}{5}\approx 8.854377448
Rhannu
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\sqrt{196\times 40\times 10^{-2}}
Lluosi 2 a 98 i gael 196.
\sqrt{7840\times 10^{-2}}
Lluosi 196 a 40 i gael 7840.
\sqrt{7840\times \frac{1}{100}}
Cyfrifo 10 i bŵer -2 a chael \frac{1}{100}.
\sqrt{\frac{392}{5}}
Lluosi 7840 a \frac{1}{100} i gael \frac{392}{5}.
\frac{\sqrt{392}}{\sqrt{5}}
Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{392}{5}} fel rhaniad ail israddau \frac{\sqrt{392}}{\sqrt{5}}.
\frac{14\sqrt{2}}{\sqrt{5}}
Ffactora 392=14^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{14^{2}\times 2} fel lluoswm ail israddau \sqrt{14^{2}}\sqrt{2}. Cymryd isradd 14^{2}.
\frac{14\sqrt{2}\sqrt{5}}{\left(\sqrt{5}\right)^{2}}
Mae'n rhesymoli enwadur \frac{14\sqrt{2}}{\sqrt{5}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{5}.
\frac{14\sqrt{2}\sqrt{5}}{5}
Sgwâr \sqrt{5} yw 5.
\frac{14\sqrt{10}}{5}
I luosi \sqrt{2} a \sqrt{5}, dylid lluosi'r rhifau dan yr ail isradd.
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