# Math Help - finding stationary points using differentiation

1. ## finding stationary points using differentiation

hi im not sure if this is in the right place

curve is y=(2-x)(x+1)^2

show that one stationary point is at x=-1

find the coordinates if both stationary points

any help much appreciated

2. Originally Posted by mannilea
hi im not sure if this is in the right place

curve is y=(2-x)(x+1)^2

show that one stationary point is at x=-1

find the coordinates if both stationary points

any help much appreciated
differentiating this function would be a good starting point. use the differentiation shortcuts to find f'(x), then set it equal to zero or undefined. Because this is a polynomial, all you need to do is set f'(x) equal to zero because it is never undefined.

I hope this helps you get started.

3. By the way, you should not need to multiply it out before differentiating. Use the "product rule".

Hint: after differentiating, you will be able to factor out an (x+ 1).