SOLUTION: the problem is (a2+b2) (-a2+b2) plzzz explain

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Question 990496: the problem is (a2+b2) (-a2+b2) plzzz explain
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
%28a%5E2%2Bb%5E2%29+%28-a%5E2%2Bb%5E2%29

Reverse the terms in the second parentheses so the positive
term comes first and the negative term comes second.

%28a%5E2%2Bb%5E2%29%28b%5E2-a%5E2%29

Now the second parentheses can be factored as the difference
of two squares:

%28a%5E2%2Bb%5E2%29%28b-a%29%28b%2Ba%29

Edwin