1. The problem statement, all variables and given/known data Factor the expression ac-bd+adi+bci 2. Relevant equations 3. The attempt at a solution We can factor the variable 'a' which gives: a(c+di)-bd+bci The common factor in the remaing terms is b, and if we also factor out b we get a(c+di)-b(d+ci) But this is not the way I want it factorized. I want it to be factored completely. How can that be done step by step?