document.write( "Question 610968: Evaluate the polynomial when x=5 and y=-9.\r
\n" ); document.write( "\n" ); document.write( "x^2-3y^2+2xy \n" ); document.write( "
Algebra.Com's Answer #384687 by jim_thompson5910(35256)\"\" \"About 
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x^2-3y^2+2xy\r
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\n" ); document.write( "\n" ); document.write( "(5)^2-3(-9)^2+2(5)(-9)\r
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\n" ); document.write( "\n" ); document.write( "25-3(81)+2(5)(-9)\r
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\n" ); document.write( "\n" ); document.write( "25-243-90\r
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\n" ); document.write( "\n" ); document.write( "-308\r
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\n" ); document.write( "\n" ); document.write( "So x^2-3y^2+2xy = -308 when x = 5 and y = -9\r
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