SOLUTION: find the value of xcube + 6xy + ycube - 8 when x + y = 2

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Question 975329: find the value of xcube + 6xy + ycube - 8 when x + y = 2

Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
%28x%2By%29%5E3=x%5E3%2B3x%5E2y%2B3xy%5E2%2By%5E3=x%5E3%2B3xy%28x%2By%29%2By%5E3
When x%2By=2 ,
%28x%2By%29%5E3=2%5E3=8 and ,
so x%5E3%2B6xy%2By%5E3=8--->x%5E3%2B6xy%2By%5E3-8=0