SOLUTION: Hi everyone, Can someone help me multiply the following problem? (a^2+2ab-b^2)(a^2-7ab+b^2)

Question 84583: Hi everyone, Can someone help me multiply the following problem?
(a^2+2ab-b^2)(a^2-7ab+b^2)
Found 3 solutions by vertciel, checkley75, rapaljer:
Answer by vertciel(183)   (Show Source): You can put this solution on YOUR website!
(a^2 + 2ab - b^2)(a^2 - 7ab + b^2)
= a^4 - 7a^3b + a^2b^2 + 2a^3b - 14a^2b^2 + 2ab^3 - a^2b^2 + 7ab^3 - b^4
I'll pass it onto you now.
Answer by checkley75(3666)   (Show Source): You can put this solution on YOUR website!
A^2+2AB-B^2
A^2-7AB+B^2
--------------------
A^4+2A^3B-A^2B^2-7A^3B-14A^2B^2+7AB^3+A^2B^2+2AB^3-B^4 NOW COMBINE LIKE TERMS.
A^4-5A^3B+9AB^3-B^4.
Answer by rapaljer(4671)   (Show Source): You can put this solution on YOUR website!
When I solved your problem, I did NOT get the same answer as the one posted by Checkley75. Here is what I got:

Multiply the first times everything in the second parentheses:

Next, multiply 2ab times everything in the second parentheses:

Last, multiply times everything in the second parentheses:

Now, combine like terms:

==>
=======>
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R^2 at SCC

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