SOLUTION: Sqrt(80)-Sqrt(20)+ 4 Sqrt(5) I have no clue how to even set this problem up to solve it. Does anyone know how to solve this?

Algebra ->  Rational-functions -> SOLUTION: Sqrt(80)-Sqrt(20)+ 4 Sqrt(5) I have no clue how to even set this problem up to solve it. Does anyone know how to solve this?      Log On


   

Question 326135: Sqrt(80)-Sqrt(20)+ 4 Sqrt(5)
I have no clue how to even set this problem up to solve it. Does anyone know how to solve this?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the terms can be combined by factoring out the whole square roots

sqrt(16*5) - sqrt(4*5) + 4 sqrt(5)

4 sqrt(5) - 2 sqrt(5) + 4 sqrt(5)

6 sqrt(5)