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simplify (2a+12)(3a+3)+a

need to know if you use FOIL to simplify this problem
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1 Answer

Yes, Foil is key here! First, Outside, Inside, Last! Whenever you see sets of parentheses right next to one another it means to multiply, and if the parentheses include an operation (+,-,*) and variables (a,b,x,y) then we use FOIL to simplify.
Example:
(2x+3)(6x+2)+x
First, focus on the parentheses (PEMDAS)
(2x+3)(6x+2)
Now FOIL,
F: (2x*6x) = 12x^2
O: (2x*2) = 4x
I: (3*6x) = 18x
L:(3*2) = 6
12x^2+4x+18x+6
Simplify, combine like terms
12x^2+22x+6
Don't forget your original equation included +x, so
12x^2+22x+6+x
Simplify
12x^2+23x+6