document.write( "Question 892848: please help me to answer this:
\n" ); document.write( "if x-y=7,xy=-8,what is the value of x^2+3xy+y^2
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Algebra.Com's Answer #540895 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%28x-y%29%5E2=x%5E2-2xy%2By%5E2\"$
\n" ); document.write( " $\"%28x-y%29%5E2%2B5xy=x%5E2-2xy%2By%5E2%2B5xy\"$
\n" ); document.write( " $\"%28x-y%29%5E2%2B5xy=x%5E2%2B3xy%2By%5E2\"$
\n" ); document.write( " $\"x%5E2%2B3xy%2By%5E2=%287%29%5E2%2B5%28-8%29\"$
\n" ); document.write( " $\"x%5E2%2B3xy%2By%5E2=49-40\"$
\n" ); document.write( " $\"highlight_green%28x%5E2%2B3xy%2By%5E2=9%29\"$
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