document.write( "Question 89365: Multiply. (a^2 + ab – b^2)(a^2 – 4ab + b^2) \n" ); document.write( "

Algebra.Com's Answer #64937 by malakumar_kos@yahoo.com(315) $\"\"$ $\"About$

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\n" ); document.write( "Multiply. (a^2 + ab – b^2)(a^2 – 4ab + b^2)\r
\n" ); document.write( "\n" ); document.write( " a^2(a^2-4ab+b^2)+ab(a^2-4ab+b^2)-b^2(a^2-4ab+b^2)
\n" ); document.write( " = a^4-4a^3b+a^2b^2+a^3b-4a^2b^2+ab^3-a^2b^2-4ab^3-b^4
\n" ); document.write( " = a^4-b^4-3a^3b-3ab^3-4a^2b^2
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