SOLUTION: Graph the function. Use the graph to find any relative maxima or minima. f(x) = x3 + 3x2 - 9x - 5

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Graph the function. Use the graph to find any relative maxima or minima. f(x) = x3 + 3x2 - 9x - 5      Log On


   

Question 1076823: Graph the function. Use the graph to find any relative maxima or minima.
f(x) = x3 + 3x2 - 9x - 5
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
graph%28300%2C300%2C-10%2C10%2C-10%2C100%2Cx%5E3%2B3x%5E2-9x-5%29
critical values where the derivative=0
3x^2+6x-9=0
3(x^2+2x-3)=0
3(x+3)(x-1)=0
at x=-3 and 1
and y=22 and y=-10