2007-01-03 11:40:08 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
(x + 3) (x + 4)
F: you take the first number in the parentheses from each, and multiply, so find x times x--> x squared.
O: multiply the two numbers on the outside, x and 4--> 4x
I: multiply the two numbers on the inside, 3 and x--> 3x
L: multiply the last two numbers: 3 and 4-- > 12
add them all together and you have x^2 + 7x + 12.
I like the technique-- I'm in calculus and I still use this
2007-01-03 11:45:33 · answer #1 · answered by car of boat 4 · 0⤊ 0⤋
FOIL stands for First Outside Inside Last. It's how you factor (x+2)*(x+3). First = x*x=x^2, outside = x*3=3x, Inside = 2*x=2x, and Last =2*3=6. Combine like terms to get. x^2+5x+6. That is how you use FOIL.
2007-01-03 19:45:11 · answer #2 · answered by scubamasterme 3 · 0⤊ 0⤋
foiling
for explample
(x+3)(x+2)=x^2+2x+3x+6 ( notice how i got these numbers)
=x^2+5x+6
2007-01-03 19:44:28 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Please check out the reference:
2007-01-03 19:43:53 · answer #4 · answered by kellenraid 6 · 0⤊ 0⤋