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September 22, 2014

September 22, 2014

Posted by **Heather** on Wednesday, December 10, 2008 at 9:54am.

Because you use distributive property with 2 sets

- Algebra 2 -
**Reiny**, Wednesday, December 10, 2008 at 10:29amThe FOIL "method" refers specifically to the multiplication of two binomials

e.g. (2x+3)(4x-1)

F : first times first -- 8x^2

O : the outsiders -- -2x

I : insiders -- 12x

L : the lasts -- -3

when you have a monomial times a binomial

e.g.

3x(2x+5y)

just use the distributive property

= 6x^2 + 15xy

in effect you are using the distributive property when you are doing the FOIL thing

(2x+3)(4x-1)

= 2x(4x - 1) + 3(4x - 1)

= 8x^2 - 2x + 12x - 3

= ...

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