The Purplemath Forums

Hello, I am trying to simplify this expression AC' + AB' + A'BC' + A'B'C TO AC' + BC' + B'C This is what I have done so far: AC' + A'BC' + AB' + A'B'C = C'(A+A'B) + B'(A+A'C) = C'(A+B) + B'(A+C) = AC' + BC' + AB' + BC' I wanna get rid off AB' but am not sure how?? Any helo will be appreciated.