# Simplifying a boolean expression

I'm working on the following problem:

I found the correct answer for part (i): $$Z = \left(\overline{(\overline{A + B})C}\right) (C\overline{D})$$ How can I simplify this expression?

• De Morgan is helpful. There are also a lot of identity boolean expressions that would help. See here. Jul 28 '14 at 12:20
• The question is asking if there is a simpler Boolean expression to give the same outputs. It's asking you to apply DeMorgan's laws to find a simpler solution. What have you tried? Jul 28 '14 at 12:21
• This is the same type of question as "simplify the expression 5x + x - 3" except in logic. Apply a few transforms (eg: "not(A and B) -> (not A) or (not B)") and see what can be done. Jul 28 '14 at 12:35