SOLUTION: 4 SQRT 45 - 7 SQRT 405

Algebra ->  Radicals -> SOLUTION: 4 SQRT 45 - 7 SQRT 405      Log On


   

Question 164463: 4 SQRT 45 - 7 SQRT 405
Answer by checkley77(12844) About Me  (Show Source):
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4 SQRT 45 - 7 SQRT 405
4SQRT(9*5)-7SQRT(9*9*5)
4*3SQRT(5)-7*9SQRT(5)
12SQRT(3)-63SQRT(5)
(12-63)SQRT(5)
-51SQRT(5)