FOIL
Method
A technique for distributing two binomials.
The letters FOIL stand for First, Outer, Inner, Last. First means
multiply the terms which
occur first in each binomial. Then Outer means multiply the outermost
terms in the product. Inner means multiply the innermost
two terms.
Last means multiply the terms which occur last in each binomial.
Then simplify the products and combine any like
terms which may
occur.
Example:
(x +
2)(x +
5) = x·x + x·5 +
2·x + 2·5
First Outer Inner Last
= x^{2} +
7x + 10
See
also
Distributing
rules, binomial theorem
