What is the FOIL method?

FOIL = First, Outer, Inner, Last

Used to multiply two binomials (a+b)(c+d):
- First: a × c
- Outer: a × d
- Inner: b × c
- Last: b × d

Example: (x+2)(x+3)
= x² + 3x + 2x + 6
= x² + 5x + 6