Subtract from .
Step 1: Expand .
To find the product of two binomials, multiply each term of the first binomial by each term of the second binomial and add those products: .
Step 2: Expand .
When squaring an expression consisting of the difference of two terms, we can use the formula .
Step 3: Find the difference between the two original expressions. Substitute the results from Step 1 and Step 2, and combine like terms.