Enrhifo
172\sqrt{5}-5\sqrt{2}\approx 377.532624318
Rhannu
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174\sqrt{5}-2\sqrt{2}-2\sqrt{5}-\sqrt{18}
Ffactora 20=2^{2}\times 5. Ailysgrifennu ail isradd y lluoswm \sqrt{2^{2}\times 5} fel lluoswm ail israddau \sqrt{2^{2}}\sqrt{5}. Cymryd isradd 2^{2}.
172\sqrt{5}-2\sqrt{2}-\sqrt{18}
Cyfuno 174\sqrt{5} a -2\sqrt{5} i gael 172\sqrt{5}.
172\sqrt{5}-2\sqrt{2}-3\sqrt{2}
Ffactora 18=3^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{3^{2}\times 2} fel lluoswm ail israddau \sqrt{3^{2}}\sqrt{2}. Cymryd isradd 3^{2}.
172\sqrt{5}-5\sqrt{2}
Cyfuno -2\sqrt{2} a -3\sqrt{2} i gael -5\sqrt{2}.
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