Enrhifo
20\sqrt{2}-2\sqrt{5}\approx 23.812135292
Rhannu
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5\times 3\sqrt{2}+\sqrt{50}-\sqrt{125}+3\sqrt{5}
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}.
15\sqrt{2}+\sqrt{50}-\sqrt{125}+3\sqrt{5}
Lluosi 5 a 3 i gael 15.
15\sqrt{2}+5\sqrt{2}-\sqrt{125}+3\sqrt{5}
Ffactora 50=5^{2}\times 2. Ailysgrifennu ail isradd y lluoswm \sqrt{5^{2}\times 2} fel lluoswm ail israddau \sqrt{5^{2}}\sqrt{2}. Cymryd isradd 5^{2}.
20\sqrt{2}-\sqrt{125}+3\sqrt{5}
Cyfuno 15\sqrt{2} a 5\sqrt{2} i gael 20\sqrt{2}.
20\sqrt{2}-5\sqrt{5}+3\sqrt{5}
Ffactora 125=5^{2}\times 5. Ailysgrifennu ail isradd y lluoswm \sqrt{5^{2}\times 5} fel lluoswm ail israddau \sqrt{5^{2}}\sqrt{5}. Cymryd isradd 5^{2}.
20\sqrt{2}-2\sqrt{5}
Cyfuno -5\sqrt{5} a 3\sqrt{5} i gael -2\sqrt{5}.
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