Enrhifo
12\sqrt{30}\approx 65.726706901
Rhannu
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\sqrt{4320}
Lluosi 216 a 20 i gael 4320.
12\sqrt{30}
Ffactora 4320=12^{2}\times 30. Ailysgrifennu ail isradd y lluoswm \sqrt{12^{2}\times 30} fel lluoswm ail israddau \sqrt{12^{2}}\sqrt{30}. Cymryd isradd 12^{2}.
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