Question

How do you simplify 4 square root 20?

Answer 1

`8sqrt5`

Explanation:

`"using the "color(blue)"law of radicals"`

`•color(white)(x)sqrtaxxsqrtb=sqrt(ab)`

`rArr4sqrt20`

`=4xxsqrt(4xx5)`

`=4xxsqrt4xxsqrt5`

`=4xx2xxsqrt5=8sqrt5`