College Algebra / Unit 2 Alg 068 short lesson, about 20 seconds
FOIL
Captions available
The idea
FOIL — First, Outer, Inner, Last — orders the four products when two binomials multiply.
In practice
(x + 3)(x + 5): First x², Outer 5x, Inner 3x, Last 15 — collected, x² + 8x + 15.
Where people slip
FOIL is distribution with a memory aid; it works on binomials only.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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