Enrhifo
\sqrt{10}+5\sqrt{2}\approx 10.233345472
Rhannu
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\sqrt{5}\sqrt{10}+\sqrt{5}\sqrt{2}
Defnyddio’r briodwedd ddosbarthu i luosi \sqrt{5} â \sqrt{10}+\sqrt{2}.
\sqrt{5}\sqrt{5}\sqrt{2}+\sqrt{5}\sqrt{2}
Ffactora 10=5\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{5\times 2} fel lluoswm ail israddau \sqrt{5}\sqrt{2}.
5\sqrt{2}+\sqrt{5}\sqrt{2}
Lluosi \sqrt{5} a \sqrt{5} i gael 5.
5\sqrt{2}+\sqrt{10}
I luosi \sqrt{5} a \sqrt{2}, dylid lluosi'r rhifau dan yr ail isradd.
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