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31 March, 18:39

Simplify 3 square root of 20 / square root of 5

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  1. 31 March, 20:07
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    -7√5

    rewrite 20 as 2^2·5

    factor 4 out of 20. negative ∛4 (5) - √5

    rewrite 4 and 2^2 negative ∛2^2·5-√5

    pull terms out from under the radical

    -3 (2√5) √5

    multiply 2 by - 3

    -6√5-√5

    subtract √5 from - 6√5

    -7√5

    the answer is - 7√5
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