SOLUTION: multiply and simplify (squareroot 6-2root3) (squareroot 6 +2root3)

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Question 41767: multiply and simplify
(squareroot 6-2root3) (squareroot 6 +2root3)
Answer by fractalier(1829) About Me  (Show Source):
You can put this solution on YOUR website!
Just FOIL it out...we have
(sqrt(6) - 2*sqrt(3)) * (sqrt(6) + 2*sqrt(3)) =
sqrt(36) + 2*sqrt(18) - 2*sqrt(18) - 4*sqrt(9) =
6 - 12 =
-6