SOLUTION: simplify {{{ sqrt(45)-10/sqrt(5) }}}

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Question 701399: simplify +sqrt%2845%29-10%2Fsqrt%285%29+
Answer by Simnepi(216) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%2845%29-10%2Fsqrt%285%29
Because 45 is 9*5 we can re-write this assqrt%289%2A5%29
we can take out the sqrt%289%29 to give 3sqrt%285%29
so now we have
3sqrt%285%29-10%2Fsqrt%285%29 we can now get rid of the fraction by multiplying through by sqrt%285%29
this gives
%283sqrt%285%29%2Asqrt%285%29%29-%28%2810%2Fsqrt%285%29%29%2Asqrt%285%29%29 to give
3*5 - 10 = 5