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## Homework Statement

simplify 5√20 / 5√15

## Homework Equations

express your answer as a surd

## The Attempt at a Solution

Looking for someone to check my work

1. multiply (5√20)/(2√15) by (√15/√15)

2. Above gives (5√300)/30

3. Simplify the topline to 5 √100 x √3

4. answer (50√3) / 30

I checked my answer using http://www.wolframalpha.com/input/?i=simplify+(5√20)/(2√15)

says I should get 5/√3

how do you go about working out the above answer

thanks

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