Question

Please help me!

If f(x) = 3x^3 -5, what is f(x) when x=2??

Answer 1

19

Explanation:

f(x) when x=2 is just a fancy way of saying substitute the x in this equation with 2.

so the equation becomes..

3(2)^3-5 ... remeber PEMDAS

3(8)-5

24 -5 =19