document.write( "Question 55371: factor to the nearest tenth\r
\n" ); document.write( "\n" ); document.write( "x^2+7xy-18y^2 \n" ); document.write( "

Algebra.Com's Answer #37563 by funmath(2933) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"x%5E2%2B7xy-18y%5E2\"$
\n" ); document.write( "(x___y)(x___y)
\n" ); document.write( "Two numbers that multiply to get -18 (c), but add together to get 7 (b) are:
\n" ); document.write( "9 and -2
\n" ); document.write( "9*-2=-18 and 9+(-2)=7
\n" ); document.write( " $\"highlight%28%28x%2B9y%29%28x-2y%29%29\"$
\n" ); document.write( "Check by foiling:
\n" ); document.write( "(x+9y)(x-2y)
\n" ); document.write( "x(x)+x(-2y)+9y(x)+9y(-2y)
\n" ); document.write( " $\"x%5E2-2xy%2B9xy-18y%5E2\"$
\n" ); document.write( " $\"x%5E2%2B7xy-18y%5E2\"$ We're right!!!
\n" ); document.write( "Happy Calculating!!! \n" ); document.write( "

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