document.write( "Question 266386: add (5x^2-xy+y^2)+(-x^2-7xy+9y^2) \n" ); document.write( "
Algebra.Com's Answer #195733 by user_dude2008(1862)\"\" \"About 
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(5x^2-xy+y^2)+(-x^2-7xy+9y^2) = 4x^2 - 8xy +10y^2 \n" ); document.write( "
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