SOLUTION: I am really stumped on this problem. Can you explain it to me? I have tried to do the foil method but get messed up somewhere. (2(sqrt)3 +9)(7 (sqrt)3-5)

Algebra ->  Square-cubic-other-roots -> SOLUTION: I am really stumped on this problem. Can you explain it to me? I have tried to do the foil method but get messed up somewhere. (2(sqrt)3 +9)(7 (sqrt)3-5)      Log On


   

Question 544720: I am really stumped on this problem. Can you explain it to me? I have tried to do the foil method but get messed up somewhere.
(2(sqrt)3 +9)(7 (sqrt)3-5)
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
%282sqrt%283%29%2B9%29%287sqrt%283%29-5%29 foil
14%28sqrt%283%29%29%5E2%2B10sqrt%283%29%2B63sqrt%283%29-45 the sqrt ^2 is canceled, then add like terms
14%283%29%2B73sqrt%283%29-45multiply 14 and 3
42%2B73sqrt%283%29-45add like terms
73sqrt%283%29-3 im going to leave it like this if u need the number simply imput it into a calculator.
approx ~123.4397