Enrhifo
5\sqrt{5}-4\sqrt[3]{2}\approx 6.140655688
Cwis
Arithmetic
5 problemau tebyg i:
\sqrt { 20 } - \sqrt[ 3 ] { 2 } + \sqrt { 45 } - \sqrt[ 3 ] { 54 }
Rhannu
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2\sqrt{5}-\sqrt[3]{2}+\sqrt{45}-\sqrt[3]{54}
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}.
2\sqrt{5}-\sqrt[3]{2}+3\sqrt{5}-\sqrt[3]{54}
Ffactora 45=3^{2}\times 5. Ailysgrifennu ail isradd y lluoswm \sqrt{3^{2}\times 5} fel lluoswm ail israddau \sqrt{3^{2}}\sqrt{5}. Cymryd isradd 3^{2}.
5\sqrt{5}-\sqrt[3]{2}-\sqrt[3]{54}
Cyfuno 2\sqrt{5} a 3\sqrt{5} i gael 5\sqrt{5}.
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