# What is the standard form of # y= (-7x-9)^3-(2x-1)^2#?

##### 1 Answer

Nov 24, 2017

#### Explanation:

This is a really ugly problem, but the binomial theorem helps a lot. The binomial theorem lets you raise binomials to high powers without exhausting a lot of time.

We'll tackle the cube first.

Here, we can substitute our values.

Using the binomial theorem, we can find that:

The second part is easier:

Now we add the two together: