Question

Find the lcoal min and max values of the function.
f(x)= 2x^3+15x^2-36x

Answer 1

I got this so far:
f '(x)= 6x^2+30x-36, then I set it to zero
x=2,3

Answer 2

+10x for the middle term, ya?

Answer 3

oops I mean 15x^2, sorry about that!

Answer 4

\[\Large\rm 0=6x^2+30x-36\]Divide a 6 out of everything,\[\Large\rm0=x^2+5x-6\]Hmm your solutions look a little off.
I think it factors differently.

Answer 5

Not 2 and 3,
try the other factors of 6
:D

Answer 6

oops! It's x= -6 and 1

Answer 7

Ya there we go!

Answer 8

Thanks @zepdrix ! I got it from here. Stupid me on factoring the equation wrong :/

Answer 9

cool c: