Hi not sure if I've got this right.

Determine any points at which the gradient of is zero, and detemine whether these are maxima, minima or points of inflection.

x = 2

(2, -5)

(left of turning point) x = 1

(1, -3)

(right of turning point) x = 3

(1, -9)

I'm not sure if I've done this right, but if I were to answer this I believe (2, -5) is minima.