document.write( "Question 151902: can you help me to factorize ab(x^2+y^2)- xy(a^2+b^2) thanks \n" ); document.write( "
Algebra.Com's Answer #111659 by orca(409)\"\" \"About 
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Remove the parenthesis and re-group the terms.
\n" ); document.write( "ab(x^2+y^2)- xy(a^2+b^2)
\n" ); document.write( "= abx^2 + aby^2 - a^2xy - b^2xy
\n" ); document.write( "= abx^2 - a^2xy - b^2xy + aby^2
\n" ); document.write( "= (abx^2 - a^2xy) - (b^2xy - aby^2)
\n" ); document.write( "= ax(bx - ay) - by(bx - ay)
\n" ); document.write( "= (bx - ay)(ax - by)
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