Enrhifo
\frac{2\sqrt{4391}}{25}\approx 5.301169682
Rhannu
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\sqrt{\frac{64}{625}+28}
Cyfrifo \frac{8}{25} i bŵer 2 a chael \frac{64}{625}.
\sqrt{\frac{64}{625}+\frac{17500}{625}}
Troswch y rhif degol 28 i’r ffracsiwn \frac{17500}{625}.
\sqrt{\frac{64+17500}{625}}
Gan fod gan \frac{64}{625} a \frac{17500}{625} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.
\sqrt{\frac{17564}{625}}
Adio 64 a 17500 i gael 17564.
\frac{\sqrt{17564}}{\sqrt{625}}
Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{17564}{625}} fel rhaniad ail israddau \frac{\sqrt{17564}}{\sqrt{625}}.
\frac{2\sqrt{4391}}{\sqrt{625}}
Ffactora 17564=2^{2}\times 4391. Ailysgrifennu ail isradd y lluoswm \sqrt{2^{2}\times 4391} fel lluoswm ail israddau \sqrt{2^{2}}\sqrt{4391}. Cymryd isradd 2^{2}.
\frac{2\sqrt{4391}}{25}
Cyfrifo ail isradd 625 a chael 25.
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