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I'm working on the following problem:

boolean expression

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?

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    \$\begingroup\$ De Morgan is helpful. There are also a lot of identity boolean expressions that would help. See here. \$\endgroup\$
    – sherrellbc
    Jul 28 '14 at 12:20
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    \$\begingroup\$ 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? \$\endgroup\$ Jul 28 '14 at 12:21
  • \$\begingroup\$ 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. \$\endgroup\$
    – carveone
    Jul 28 '14 at 12:35
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This is the solution:

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For safety use Karnaugh:

enter image description here

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