How do you FOIL #(3x^2-6)(x^9-2)#?

1 Answer
Guilherme N.
May 25, 2015

FOIL is acronym for First, Outsiders, Insiders and Last terms of your binominals. The four "names" indicate all the steps towards developing the multiplication of your binomials:

F #3x^2*x^9=3x^11#
O #3x^2*(-2)=-6x^2#
I #(-6)*x^9=-6x^9#
L #(-6)*(-2)=12#

Now, you just add them

#3x^11-6x^9-6x^2+12#

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