
The FOIL method is an algorithm for expanding the product of two binomials. FOIL is an acronym that stands for First, Outer, Inner, Last. 
Product  First  Outer  Inner  Last  Result 

(x + 1)(x  1)  x · x = x^{2}  x · (1) = ^{}x  1 · x = x  1 · (1) = 1  x^{2} + (11)x + (1)
= x^{2}  1 
(x  3)(x  2)  x · x = x^{2}  x · (2)\ = 2x  (3) · x = 3x  (3) · (2) = 6  x^{2} + (2  3)x + 6
= x^{2}  5x + 6 
(2x + 1)(3x + 2)  2x · 3x = 6x^{2}  2x · 2 = 4x  1 · 3x = 3x  1 · 2 = 2  6x^{2} + (4 + 3)x + 2
= 6x^{2} + 7x + 2 
Table 1 
#  A  B  C  D 
E  F  G  H  I 
J  K  L  M  N 
O  P  Q  R  S 
T  U  V  W  X 
Y  Z 
All Math Words Encyclopedia is a service of
Life is a Story Problem LLC.
Copyright © 2018 Life is a Story Problem LLC. All rights reserved.
This work is licensed under a Creative Commons AttributionShareAlike 4.0 International License