document.write( "Question 172081: Please help to figure this out- my brain hurts....Thanks!\r
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Algebra.Com's Answer #127121 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
Hint 1: \"a-b=-%28b-a%29\" so \"1-9y=-%289y-1%29\"\r
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\n" ); document.write( "\n" ); document.write( "Hint 2: \"a%5E2-b%5E2=%28a%2Bb%29%28a-b%29\" so \"y%5E2-81=%28y%2B9%29%28y-9%29\"\r
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\n" ); document.write( "\n" ); document.write( "Hint 3: To divide one fraction by the other, invert the divisor and multiply.
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