document.write( "Question 186988: (A squared + A + b)(A squared-A-B) \n" ); document.write( "
Algebra.Com's Answer #140163 by user_dude2008(1862)\"\" \"About 
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(A^2 + A + B)(A^2-A-B)\r
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\n" ); document.write( "\n" ); document.write( "Let X=A+B\r
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\n" ); document.write( "\n" ); document.write( "(A^2 + X)(A^2-X)\r
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\n" ); document.write( "\n" ); document.write( "A^4-X^2\r
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\n" ); document.write( "\n" ); document.write( "A^4-(A+B)^2\r
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\n" ); document.write( "\n" ); document.write( "A^4-(A^2+2AB+B^2)\r
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\n" ); document.write( "\n" ); document.write( "A^4-A^2-2AB-B^2\r
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\n" ); document.write( "\n" ); document.write( "Ans: (A^2 + A + B)(A^2-A-B) = A^4-A^2-2AB-B^2
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