# Thread: Help with this domain of intergers thing

1. ## Help with this domain of intergers thing

Hi, I would help with question 1.5. I don't know what exactly to do for it. It's practice questions and I wanna be ready for the real thing.

2. ## Re: Help with this domain of intergers thing

$a^2b + a b^2 + a^2 - b^2 -(a+b)$

$(a-1)(b^2 + a +a b + b)$

$(a-1)(b+1)(a+b)$