document.write( "Question 243513: add (7x^2-xy+y^2)+(-x^2-7xy+5y^2) \n" ); document.write( "
Algebra.Com's Answer #178416 by jim_thompson5910(35256)\"\" \"About 
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\"%287x%5E2-xy%2By%5E2%29%2B%28-x%5E2-7xy%2B5y%5E2%29\" Start with the given expression.\r
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\n" ); document.write( "\n" ); document.write( "\"7x%5E2-xy%2By%5E2-x%5E2-7xy%2B5y%5E2\" Remove the parenthesis.\r
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\n" ); document.write( "\n" ); document.write( "\"%287x%5E2-x%5E2%29%2B%28-xy-7xy%29%2B%28y%5E2%2B5y%5E2%29\" Group like terms.\r
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\n" ); document.write( "\n" ); document.write( "\"6x%5E2-8xy%2B6y%5E2\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So \"%287x%5E2-xy%2By%5E2%29%2B%28-x%5E2-7xy%2B5y%5E2%29=6x%5E2-8xy%2B6y%5E2\"
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