How do you simplify #-3sqrt20-sqrt5#?
1 Answer
Jul 21, 2018
Explanation:
#"using the "color(blue)"law of radicals"#
#•color(white)(x)sqrtaxxsqrtbhArrsqrt(ab)#
#-3sqrt20=-3(sqrt(4xx5))#
#color(white)(-3sqrt20)=-3(sqrt4xxsqrt5)#
#color(white)(-3sqrt20)=-3(2sqrt5)=-6sqrt5#
#-3sqrt20-sqrt5#
#=-6sqrt5-sqrt5=-7sqrt5#
