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April 20, 2014

Homework Help: Calculus

Posted by Jessi on Sunday, February 19, 2012 at 3:29pm.

Which of the following is a point at which the tangent to y=(x-2)^2(x+3) is horizontal?

a) (-2,16)
b) (-1, 18)
c) (1,4)
d) (2,0)

I found the derivative of y=(x-2)^2(x+3)

which is 3x^2-2x-8

if I solved for 0, it wouldn't give me the answer that are listed above. What did I do wrong?

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