What is the square root of 3 times square root of 15? Algebra Radicals and Geometry Connections Multiplication and Division of Radicals 1 Answer Meave60 Sep 16, 2015 3sqrt5 Explanation: sqrt3sqrt15 sqrtasqrtb=sqrtab sqrt3sqrt5=sqrt45 Factor 45. sqrt(3xx3xx5)= sqrt(3^2xx5) sqrt(a^2)=a. sqrt(3^2)=3 sqrt(3^2xx5)= 3sqrt5 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 18469 views around the world You can reuse this answer Creative Commons License