Question

How do you find the critical numbers of an expression?

Answer 1

You must find the first derivative and set it equal to zero

Answer 2

So how would i do it for 9x^3-25x^2?

Answer 3

f'(x)=27x^2-50x
factor out an x
x(27x-50)=0
from here you can use a method you like to find the roots

Answer 4

so for 9x^3-25x^2 i would factor out an x^2?

Answer 5

huh? No... you. You know how to find the derivative right?

Answer 6

no

Answer 7

Well you need to know that first before you can find critical numbers. Critical number is where the the slope is zero.

Answer 8

There are also conditions it has to satisfy and such