Inactive Tutor answered • 08/25/17
Tutor
New to Wyzant
45 = 3 x 3 x 5
Sqrt(3 x3 x5) = 3 x sqrt(5)
CHECK: [3 x sqrt(5) ]^2 = 3^2 * sqrt(5)^2 = 9 x 5 = 45
So the square root of 45 is 3 x sqrt(5)
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