foil or what
FOIL
First
Outer
Inner
Last
that is the order to multiply 2 biniomals
so
(2x+3)(4x-2)
First tirms multiply: 2x times 4x=8x²
Outer terms: 2x times -2=-4x
Inner terms: 3 times 4x=12x
Last terms: 3times -2=-6
add them all up
8x²-4x+12x-6
8x²+8x-6
