document.write( "Question 1132819: If x + y = 4 and xy = -12; what is the value of x^2 + 5xy + y^2? \n" ); document.write( "

Algebra.Com's Answer #749950 by ikleyn(52863) $\"\"$ $\"About$

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document.write( "  x^2 + 5xy + y^2 = (x^2 + 2xy + y^2) + 3xy = (x+y)^2 + 3xy = \r\n" );
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document.write( "        now substitute x+y = 4 and xy = -12 to get\r\n" );
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document.write( "=  = 16 - 36 = -20.       ANSWER\r\n" );
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