Multiplication of binomials, the FOIL method.
The FOIL method is a way to multiply binomials. "FOIL" is an acronym to remember a set of rules to perform this multiplication. To FOIL you multiply together all of the following:
- F: First terms
- O: Outer terms
- I: Inner terms
- L: Last terms
and write them as a polynomial.
Multiply (3x+1)(x + 4)
(3x+1)(x + 4)=3x2+12x+x+4=3x2+13x+4