How do you FOIL (s^2+t)(s^2+t)?

Mar 18, 2018

${s}^{4} + 2 {s}^{2} t + {t}^{2}$

Explanation:

When you $F O I L$ a set of factors (also called double distributing), we follow these steps:

$F$ - First
$O$ - Outer
$I$ - Inner
$L$ - Last

It may seem confusing with just variables, and the fact that the $s$ is squared, but it works all the same.

After following the steps given by the acronym, we get:

${s}^{4} + {s}^{2} t + {s}^{2} t + {t}^{2}$

Here we just combine like terms and get:

${s}^{4} + 2 {s}^{2} t + {t}^{2}$