Mathematics
OpenStudy (anonymous):

At what point is the tangent to f(x) = x^2 + 4x - 1 horizontal?

OpenStudy (anonymous):

take the derivative, set it equal to zero, and solve. or else just find the vertex

OpenStudy (anonymous):

vertex is $-\frac{b}{2a}=-\frac{4}{2}=-2$ so the point is $(-2,-5)$

OpenStudy (lalaly):

The tangent line will be horizontal at the vertex. You can either graph the equation to find it or you can complete the square.

OpenStudy (lalaly):

oh didnt see ur answer satellite,