# How do you simplify 4 square root 20?

##### 1 Answer

Mar 20, 2018

#### Explanation:

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

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

#rArr4sqrt20#

#=4xxsqrt(4xx5)#

#=4xxsqrt4xxsqrt5#

#=4xx2xxsqrt5=8sqrt5#