# How do you find the derivative of #f(x) = [3(x)^2] - 4x#?

##### 1 Answer

Mar 31, 2018

#### Explanation:

We have:

Remember the following rules:

The power rule:

The constant multiplication rule:

If a variable is being multiplied by a constant, you can always bring the constant outside the derivative. For example:

Subtraction rule (Here is an example):

Therefore: