What is the square root of 45 times the square root of -5? Algebra Radicals and Geometry Connections Multiplication and Division of Radicals 1 Answer bp Sep 8, 2015 15 i Explanation: sqrt45 * sqrt-5 -> sqrt45*i sqrt5 ->i sqrt(45*5) ->i sqrt225 ->15 i 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 2021 views around the world You can reuse this answer Creative Commons License