Determine whether the point at (-2, -16) is the location of a minimum or maximum, or a point of inflection for the function x^2 +4x - 12

Question

anonymous · Answer

find the derivative of the function , the derivative =0  then find x

anonymous · Answer

whats the derivative of the function?

anonymous · Answer

$$f \prime(x) =2x+4$$$$f \prime(x)=0$$ then 2x+4=0 
divide by 2 
x+2=0
x=-2

anonymous · Answer

u must know the derivative rules to find the derivative

anonymous · Answer

ohhhh thank you!

anonymous · Answer

the solution is not over yet

anonymous · Answer

u must find the the second derivative 
$$f \prime \prime (x)=2 $$
$$f \prime \prime (-2)=2 $$
2>0 then the point (-2,16) is minimum

anonymous · Answer

got it ?

anonymous · Answer

and u r welcome :D

anonymous · Answer

ohh okay yes i get it, thank you again.

anonymous · Answer

u r welcome again :D , anytime