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how come 10/square root 5 is the same as 2/square root 5?
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\[\large \frac{10}{\sqrt{5}}\neq \frac{2}{\sqrt{5}}\]
oh wait i get it, you just rationalise it
so there must be a typo somewhere
oh sorry i meant 2squareroot 5
\[\frac{\sqrt{10}}{\sqrt{5}}=\sqrt{\frac{10}{5}}\]
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oh ok, yeah rationalize the denominator by multiplying both top and bottom by sqrt(5) to get your answer
\[\frac{10}{\sqrt{5}}=\frac{10}{\sqrt{5}}\frac{\sqrt{5}}{\sqrt{5}}=\frac{10\sqrt{5}}{5}=2\sqrt{5}\]
thank you
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