# How do you find the binomial expansion of #(x + y)^7#?

##### 1 Answer

#### Answer:

Use the Binomial Theorem and Pascal's triangle to find:

#### Explanation:

The Binomial Theorem tells us:

where

So in our case:

These

Each number is formed by adding the two numbers above to the left and right.

The last row gives us the coefficients we need: