# Need help simplifying

Discussion in 'Homework Help' started by minimugy, Mar 30, 2011.

1. ### minimugy Thread Starter New Member

Mar 2, 2011
7
0
Hello! i have a function that i need to simplify to add to a bigger question on my homework.

the function i have is

F= A'D + BC'D + AB'D'

so far i have

D(A' + BC') + AB'D' (which i simplified this way but im not sure is correct)

= D(A' + BC') + D'(AB')
= (D+D')(A' + BC')(AB')
= (A' + BC')(AB')

im not sure if it would be (A' +BC') + (AB') or the way i have it. anything helps!

thanks!

2. ### Georacer Moderator

Nov 25, 2009
5,181
1,289
This series of equations is seriously wrong. You can't go from
D(A' + BC') + D'(AB') to (D+D')(A' + BC')(AB').

I suggest you do a revision on Boolean algebra rules.

Must you simplify the expression through Boolean identities or can you use a Karnaugh map?

3. ### minimugy Thread Starter New Member

Mar 2, 2011
7
0
i got the function from a k-map. but i am stuck on simplifying it.

4. ### Georacer Moderator

Nov 25, 2009
5,181
1,289
If you got it from a K-map and you extracted it correctly from it, then there isn't much simplification that can improve the function's length.

5. ### johncena Member

Aug 15, 2010
32
0
can we have a look at your output (F) so we can check if you did the k-map correctly..

if you are 100% sure that your equation is correct, that one was already in simplified state.