Enrhifo
\sqrt{5}-\sqrt{3}\approx 0.50401717
Rhannu
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\frac{\left(\sqrt{35}-\sqrt{21}\right)\sqrt{7}}{\left(\sqrt{7}\right)^{2}}
Mae'n rhesymoli enwadur \frac{\sqrt{35}-\sqrt{21}}{\sqrt{7}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{7}.
\frac{\left(\sqrt{35}-\sqrt{21}\right)\sqrt{7}}{7}
Sgwâr \sqrt{7} yw 7.
\frac{\sqrt{35}\sqrt{7}-\sqrt{21}\sqrt{7}}{7}
Defnyddio’r briodwedd ddosbarthu i luosi \sqrt{35}-\sqrt{21} â \sqrt{7}.
\frac{\sqrt{7}\sqrt{5}\sqrt{7}-\sqrt{21}\sqrt{7}}{7}
Ffactora 35=7\times 5. Ailysgrifennu ail isradd y lluoswm \sqrt{7\times 5} fel lluoswm ail israddau \sqrt{7}\sqrt{5}.
\frac{7\sqrt{5}-\sqrt{21}\sqrt{7}}{7}
Lluosi \sqrt{7} a \sqrt{7} i gael 7.
\frac{7\sqrt{5}-\sqrt{7}\sqrt{3}\sqrt{7}}{7}
Ffactora 21=7\times 3. Ailysgrifennu ail isradd y lluoswm \sqrt{7\times 3} fel lluoswm ail israddau \sqrt{7}\sqrt{3}.
\frac{7\sqrt{5}-7\sqrt{3}}{7}
Lluosi \sqrt{7} a \sqrt{7} i gael 7.
\sqrt{5}-\sqrt{3}
Rhannu pob term 7\sqrt{5}-7\sqrt{3} â 7 i gael \sqrt{5}-\sqrt{3}.
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