Quick self-quiz
Tap each word to check what it stands for.
When to use it
Use it when multiplying two binomials such as $(x + 3)(x - 2)$ to make sure you hit all four term pairs.
Example
For , First gives , Outer gives , Inner gives , Last gives , so the product is .
Common mistake
Forgetting the Outer and Inner terms and only multiplying First and Last, which misses the middle terms entirely.
