SOLUTION: i need help to solve this : Directions are Simplify square root of 15 x (1- (square root of 45)

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Question 712289: i need help to solve this :
Directions are Simplify
square root of 15 x (1- (square root of 45)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%2815%29%2A%281-+sqrt%2845%29%29...write sqrt%2815%29 as sqrt%283%29sqrt%285%29 and sqrt%2845%29 as sqrt%289%29sqrt%285%29

sqrt%283%29sqrt%285%29%2A%281-+sqrt%289%29%2Asqrt%285%29%29

sqrt%283%29sqrt%285%29%2A%281-+3%2Asqrt%285%29%29

sqrt%283%29sqrt%285%29-+3%2Asqrt%285%29sqrt%283%29sqrt%285%29......since sqrt%285%29%2Asqrt%285%29=%28sqrt%285%29%29%5E2=5, we have

sqrt%283%29sqrt%285%29-+3%2A5sqrt%283%29

sqrt%283%29sqrt%285%29-+15sqrt%283%29

sqrt%283%29%28sqrt%285%29-+15%29

1.73%282.236-+15%29

1.73%28-12.763932%29

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