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March 28, 2015

March 28, 2015

Posted by **Derek** on Wednesday, June 27, 2012 at 8:39pm.

After get f' i got the answer -5/4. What did i do wrong or is that the critical number?

- math -
**Steve**, Thursday, June 28, 2012 at 10:42amcritical number: where y'=0 or y' undefined.

Anyway, y' = (x^2-8x-20)/(x-4)^2

y'=0 when x = -2,10

y' undefined when x = 4

how did you come up with -5/4 ?

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