Show √20 / (√5 + 1 ) can be written as 10/(5+ √5)

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lhh2003
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Here is my working :

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I don’t know what to do next.
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LiechtensteinMAN
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If you times the top and bottom of the original fraction both by root 5 then you should get what your looking for
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lhh2003
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(Original post by LiechtensteinMAN)
If you times the top and bottom of the original fraction both by root 5 then you should get what your looking for
Makes sense now. Thanks.
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