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posted by LaShawn on Wednesday, February 13, 2013 at 9:27am.

Simplify 1-y^2 ____________ y^2-4y-5

(1 - y^2)/(y^2- 4y - 5) = (1-y)(1+y)/((y-5)(y+1)) = (1-y)/(y-5) , y ≠ -1

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