document.write( "Question 40475: I have another problem that I seem to have a bit of trouble understanding...
\n" ); document.write( "y^2-81/y^2 * y^2-9y/y^2+y+90
\n" ); document.write( "This problem has to be solved as a ration expression.
\n" ); document.write( "However I think the answer would be y+2/y-2.
\n" ); document.write( "For some reason I dont think that is rite.
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Algebra.Com's Answer #25917 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
(y^2-81)/y^2 * (y^2-9y)/(y^2+y-90)\r
\n" ); document.write( "\n" ); document.write( "Factor where you can as follows:\r
\n" ); document.write( "\n" ); document.write( "[(y-9)(y+9)]/y^2 * y(y-9)/[(y+10)(y-9)]\r
\n" ); document.write( "\n" ); document.write( "Look for factors that are common to numerator and denominator: such
\n" ); document.write( "as y and (y-9); cancel them as follows:\r
\n" ); document.write( "\n" ); document.write( "[(y-9)(y+9)]/y* 1/[y+10]\r
\n" ); document.write( "\n" ); document.write( "Multiply the fractions to get:\r
\n" ); document.write( "\n" ); document.write( "[y^2-81]/[y(y+10)]
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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