Basically, don't listen to the other guy, he is making up random stuff, report him.
You can solve this just by multiplying by FOIL
Firsts
Outsides
Insides
Lasts
The firsts of (x+3)(x+2) are x and x, so x*x = x^2
The outsides of (x+3)(x+2) are x and 2, so x*2 = 2x
The insides of (x+3)(x+2) are 3 and x, so 3*x = 3x
The lasts of (x+3)(x+2) are 3 and 2, so 3*2 = 6
Add of of that together, x^2 + 2x + 3x + 6
So the answer is: x^2 + 5x + 6