document.write( "Question 250930: x^2 + xy = 7
\n" ); document.write( "x + 2y = 5\r
\n" ); document.write( "\n" ); document.write( "slove for x and y \n" ); document.write( "

Algebra.Com's Answer #182746 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
1. $\"x%5E2+%2B+xy+=+7\"$
\n" ); document.write( "2. $\"x+%2B+2y+=+5\"$
\n" ); document.write( "From 2,
\n" ); document.write( " $\"2y=5-x\"$
\n" ); document.write( " $\"y=%281%2F2%29%285-x%29\"$
\n" ); document.write( " $\"xy=%281%2F2%29%285x-x%5E2%29\"$
\n" ); document.write( "Substitute into 1,
\n" ); document.write( "1. $\"x%5E2+%2B+xy+=+7\"$
\n" ); document.write( " $\"x%5E2+%2B+%281%2F2%29%285x-x%5E2%29+=+7\"$
\n" ); document.write( " $\"2x%5E2+%2B+5x-x%5E2+=+14\"$
\n" ); document.write( " $\"x%5E2%2B5x-14=0\"$
\n" ); document.write( " $\"%28x%2B7%29%28x-2%29=0\"$
\n" ); document.write( "Two solutions:
\n" ); document.write( " $\"+x%2B7=0+\"$
\n" ); document.write( " $\"+x=-7\"$
\n" ); document.write( " $\"+2y=5-x=5-%28-7%29=12\"$
\n" ); document.write( " $\"+y=6\"$
\n" ); document.write( "( $\"+-7\"$ , $\"+6\"$ )
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"+x-2=0\"$
\n" ); document.write( " $\"+x=2\"$
\n" ); document.write( " $\"+2y=5-x=5-2=3\"$
\n" ); document.write( " $\"+y=3%2F2\"$
\n" ); document.write( "( $\"+2\"$ , $\"+3%2F2\"$ )
\n" ); document.write( "Graphically, here is the solution also,
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