Finding turning points of polynomials functions (1 Viewer)

[Prazo1994]

Hi Guys
just doing some maths revision for the trials

I completely forgot how to find the turning points of polynomials. Could you guys help me with:

a) 12x -x^3 +3
b) 7+ 5x - x^2-x^3

cheers!

 

[iBibah]

Derive them then set the derivative equal to zero (the gradient is zero at a turning point). Find the values for x which satisfy this, then sub those values into the second derivative to test concavity/max or min.

 

[OMGITzJustin]

Hi Guys
just doing some maths revision for the trials

I completely forgot how to find the turning points of polynomials. Could you guys help me with:

a) 12x -x^3 +3
b) 7+ 5x - x^2-x^3

cheers!

what the guy above me said - a side note: O.P, the units on your sig only add up 2 9 units? were you accelerated last year for something?