FOIL Method - The Distributive Law

The Distributive Law

The FOIL method is equivalent to a two-step process involving the distributive law:

\begin{align}
(a+b)(c+d) &{} = a(c+d) + b(c+d) \\
&{}= ac + ad + bc + bd
\end{align}

In the first step, the is distributed over the addition in first binomial. In the second step, the distributive law is used to simplify each of the two terms. Note that this process involves a total of three applications of the distributive property.

Read more about this topic:  FOIL Method

Famous quotes containing the word law:

    I hope I may claim in the present work to have made it probable that the laws of arithmetic are analytic judgments and consequently a priori. Arithmetic thus becomes simply a development of logic, and every proposition of arithmetic a law of logic, albeit a derivative one. To apply arithmetic in the physical sciences is to bring logic to bear on observed facts; calculation becomes deduction.
    Gottlob Frege (1848–1925)