document.write( "Question 302223: Simplify (2y^-2+y^-1)/(2y^-2-y^-1) \n" ); document.write( "

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Simplify (2y^-2+y^-1)/(2y^-2-y^-1)\r
\n" ); document.write( "\n" ); document.write( " $\"%28%282%2F%28y%5E2%29%29%2B%281%2Fy%29%29+\"$ ÷ $\"%28%282%2F%28y%5E2%29%29-%281%2Fy%29%29+\"$ \r
\n" ); document.write( "\n" ); document.write( "Common denominator = y^2\r
\n" ); document.write( "\n" ); document.write( "This gives:
\n" ); document.write( " $\"%28%282%2By%29%2F%28y%5E2%29%29%29+\"$ * $\"%28%28y%5E2%29%2F%282-y%29%29%29+\"$ \r
\n" ); document.write( "\n" ); document.write( "cancel out \"y^2\" \r
\n" ); document.write( "\n" ); document.write( " $\"%28%282%2By%29%2F%282-y%29%29%29+\"$ \n" ); document.write( "

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