SOLUTION: Multiply. (a^2 + ab – b^2)(a^2 – 4ab + b^2)
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Question 89365: Multiply. (a^2 + ab – b^2)(a^2 – 4ab + b^2)
Answer by malakumar_kos@yahoo.com(315) (Show Source): You can put this solution on YOUR website!
Multiply. (a^2 + ab – b^2)(a^2 – 4ab + b^2)
a^2(a^2-4ab+b^2)+ab(a^2-4ab+b^2)-b^2(a^2-4ab+b^2)
= a^4-4a^3b+a^2b^2+a^3b-4a^2b^2+ab^3-a^2b^2-4ab^3-b^4
= a^4-b^4-3a^3b-3ab^3-4a^2b^2
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