How Do I do foil?

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How Do I do foil?

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Answer 1 · 2018-03-30T01:27:35

See below.

Explanation:

To $F O I L$ $FOIL$ , is to multiply two or more factors together, to form one whole function.

$F O I L$ $FOIL$ is an acronym for the following terms which indicates how to multiply two binomials.

$F$ $F$ - First

$O$ $O$ - Outer

$I$ $I$ - Inner

$L$ $L$ - Last

![http://krismath.org/vocabulary_def.htm](useruploads.socratic.org)

So, for example, let's say we have two factors such as:

$(x - 1) (x + 2)$ $(color(red)(x)-color(blue)(1))(color(green)(x)+color(purple)(2))$

From here, we follow the steps provided and get this;

$(x \cdot x) + (x \cdot 2) + (- 1 \cdot x) + (x \cdot 2)$ $(color(red)x*color(green)x)+(color(red)x*color(purple)(2))+(color(blue)(-1)*color(green)(x))+(color(blue)(x*color(purple)2))$

$f (x) = x^{2} + 2 x - 1 x - 2$ $f(x)=x^2+2x-1x-2$

All we do here is combine like terms, and we have our function:

$f (x) = x^{2} + x - 2$ $f(x)=x^2+x-2$

Hope this helps!

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How Do I do foil?

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