How do you simplify 3 times the square root of 20 + 2 times the square root of 45?
2 Answers
Mar 10, 2018
Explanation:
#"using the "color(blue)"law of radicals"#
#•color(white)(x)sqrt(ab)hArrsqrtaxxsqrtb#
#rArr3sqrt20+2sqrt45#
#=(3xxsqrt(4xx5))+(2xxsqrt(9xx5))#
#=(3xxsqrt4xxsqrt5)+(2xxsqrt9xxsqrt5)#
#=(3xx2xxsqrt5)+(2xx3xxsqrt5)#
#=6sqrt5+6sqrt5#
#=12sqrt5#
Mar 10, 2018
Explanation: