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OpenStudy (anonymous):
find all numbers for which the rational expression is undefined y²-y-5 -------- y²-13y+40
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OpenStudy (dumbcow):
solve y^2 -13y +40 =0 factor -8*-5 =40 -8 + -5 = -13 =>(y-8)(y-5) = 0 y = 5 and 8 expression is undefined at these points
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