How do you simplify $5sqrt80$ ?

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Answer 1 · 2015-06-14T21:17:34

$5sqrt(80) = 20sqrt(5)$

$5sqrt(80) = 5sqrt(4^2*5) = 5sqrt(4^2)sqrt(5) = 5*4sqrt(5) = 20sqrt(5)$

using identity $sqrt(ab) = sqrt(a)sqrt(b)$ (when $a >= 0$ and $b >= 0$ ).

How do you simplify 5sqrt805sqrt80?