Thursday
May 23, 2013

# Homework Help: Math

Posted by Nancy.Sullivan on Monday, June 11, 2012 at 9:37pm.

if y=(x^2)/(x+4) find the values of x where there is a horizontal tangent

• Math - Steve, Tuesday, June 12, 2012 at 12:18am

y = x^2/(x+4)
y' = x(x+8)/(x+4)^2

since the denominator is not zero for x =/= -4, we just need to find there the numerator is zero.

x = 0 or -8

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