Question

If f(x) = 3x² - x, Find f( -2)
options
14
10
38

Answer 1

Explanation:

So what you start with is the variable "x" in 3 different places. When you are changing the x variable, you need to plug it into every variable in the equation. Start by doing that and the problem will look like: f (-2) = 3 (-2)^2 - (-2) Now you can start with either the 3 (-2)^2 or the - (-2), but it is better to go from left to right.

Your Best

Elina

Answer 2

Answer: 14

Explanation:

f(-2) means x is -2, so we can solve for when x = -2 by plugging -2 into the equation.

`f(-2) = 3(-2^(2)) - (-2)\\=3(4) + 2\\=12+2\\=14`