Deanna L. answered • 06/20/14

Electrical engineering major and music lover with MIT degree

To find increasing or decreasing find the first derivative and solve for zero. So in this case that's 12x^2 meaning we look around zero (-1 and 1). A parabola like this decreases until zero and increases after zero.

To find relative maxima and minima take the second derivative for 24x. Then x is still zero. it's negative going toward zero and positive going away from zero so relative minima is at zero.

Hope that helps,

Deanna