document.write( "Question 547505: what is the value of the expression 2x2+3xy-4y2 when x=2 and y=-4? \n" ); document.write( "

Algebra.Com's Answer #356400 by RiverBaggett(1) $\"\"$ $\"About$

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2(x)2+3(x)(y)-4(y)2
\n" ); document.write( "2(2)2=3(2)(-4)-4(-4)=16 \n" ); document.write( "

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