Find f'(x) and find the values(s) of x where f'(x) = 0.f(x) = (2x - 45) (x +168)f'(x) =x=(Type an integer or a simplified fraction.

Find f'(x) and find the values(s) of x where f'(x) = 0.f(x) = (2x - 45) (x² +168)f'(x) =x=(Type an integer or a simplified fraction. Use a comma to separate answers as needed.)