How do you simplify 2 times the square root of 20? Algebra Radicals and Geometry Connections Multiplication and Division of Radicals 1 Answer Alan P. Sep 11, 2015 #2xxsqrt(20) = 4sqrt(5)# Explanation: #sqrt(20) = sqrt(2^2xx5) = sqrt(2^2)xxsqrt(5) = 2xxsqrt(5)# #color(white)("XXX")#(assuming only principal [non-negative] square roots) #2xxsqrt(20) = 2xx (2xxsqrt(5))# #color(white)("XXX")=4xxsqrt(5)# #color(white)("XXX")=4sqrt(5)# Answer link Related questions How do you simplify #\frac{2}{\sqrt{3}}#? How do you multiply and divide radicals? How do you rationalize the denominator? What is Multiplication and Division of Radicals? How do you simplify #7/(""^3sqrt(5)#? How do you multiply #(sqrt(a) +sqrt(b))(sqrt(a)-sqrt(b))#? How do you rationalize the denominator for #\frac{2x}{\sqrt{5}x}#? Do you always have to rationalize the denominator? How do you simplify #sqrt(5)sqrt(15)#? How do you simplify #(7sqrt(13) + 2sqrt(6))(2sqrt(3)+3sqrt(6))#? See all questions in Multiplication and Division of Radicals Impact of this question 9994 views around the world You can reuse this answer Creative Commons License