How do you rewrite in simple radical form: $\sqrt{20}$ $sqrt 20$ ?

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Answer 1 · 2016-09-26T05:54:10

$\sqrt{20} = 2 \sqrt{5}$ $sqrt(20) = 2sqrt(5)$

If $a, b \geq 0$ $a, b >= 0$ then:

$\sqrt{a b} = \sqrt{a} \sqrt{b}$ $sqrt(ab) = sqrt(a)sqrt(b)$

Also if $a \geq 0$ $a >= 0$ then:

$\sqrt{a^{2}} = a$ $sqrt(a^2) = a$

So we find:

$\sqrt{20} = \sqrt{2^{2} \cdot 5} = \sqrt{2^{2}} \sqrt{5} = 2 \sqrt{5}$ $sqrt(20) = sqrt(2^2*5) = sqrt(2^2)sqrt(5) = 2sqrt(5)$

How do you rewrite in simple radical form: sqrt 20√20sqrt 20?