Question 25299
Do you know the FOIL Method?

(2x+6)(3x+2)

First:{{{2x*3x = 6x^2}}}

Outer:{{{2x *2 = 4x}}}

Inner:{{{6*3x = 18X}}}

Last :{{{6*2 = 12}}}

Adding all the terms we get 
{{{6x^2 + 22x + 12}}}

which means your missing term is 22x