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Obtaining minimal sum of the products using Karnaugh Maps watch

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    How do I simplify this?

    x=B.C-.D- + A-.B.C-.D + A.B.C-.D + A-.BCD + ABCD
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    If you can find two products that are identical other than one negation, their sum will simplify.

    E.g. PQRS + P\bar{Q}RS = PRS.

    You'll need to do this a few times.
 
 
 
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