College Algebra / Alg 068 · Atom · ~20 seconds
FOIL
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State
FOIL — First, Outer, Inner, Last — orders the four products when two binomials multiply.
Show
(x + 3)(x + 5): First x², Outer 5x, Inner 3x, Last 15 — collected, x² + 8x + 15.
Watch for
FOIL is distribution with a memory aid; it works on binomials only.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.