Multiply Binomial

FOIL is a mnemonic for the standard method of multiplying two binomials - hence the method may be referred to as the FOIL method.

Calculator of Multiply Binomial

$(a + b) (c + d) = ac + ad + bc + bd$

The word FOIL is an acronym for the four terms of the product:

First ("first" terms of each binomial are multiplied together)
Outer ("outside" terms are multiplied - that is, the first term of the first binomial and the second term of the second)
Inner ("inside" terms are multiplied - the second term of the first binomial and first term of the second)
Last ("last" terms of each binomial are multiplied)