Difference between revisions of "FOIL"
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<cmath>(a+b)(c+d) = ac + ad + bc + bd</cmath> | <cmath>(a+b)(c+d) = ac + ad + bc + bd</cmath> | ||
− | Here | + | Here is an example. |
<cmath>(5x + 3)(2x - 6)</cmath> | <cmath>(5x + 3)(2x - 6)</cmath> |
Revision as of 11:04, 16 August 2008
FOIL, standing for first, outside, inside, last, is a mnemonic device for remembering the distributive property when two binomials are multiplied.
Here is an example.
First we multiply the first terms
Then, the outside terms
Next, the inside terms .
Finally, we multiply the last terms
Thus, our answer is , which, when simplified, gives us a final answer of .