SOLUTION: (8 MINUS SQUARE ROOT OF 7)^2

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Question 812926: (8 MINUS SQUARE ROOT OF 7)^2
Answer by jsmallt9(3758) About Me  (Show Source):
You can put this solution on YOUR website!
%288-sqrt%287%29%29%5E2
One could use FOIL for this. But I prefer using patterns. For this binomial (two-term expression) the pattern would be:
%28a-b%29%5E2+=+a%5E2-2ab%2Bb%5E2
In your expression the 'a' will be '8' and the 'b' will be sqrt%287%29. Replacing the a's and b's in the pattern with these values we get:
%288%29%5E2-2%288%29%28sqrt%287%29%29%2B%28sqrt%287%29%29%5E2
Simplifying...
64+-16sqrt%287%29%2B7
71-16sqrt%287%29