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Boolean Algebra: Sum of Products

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http://forum.allaboutcircuits.com – Hey all, I'm trying to wrap my head around boolean algebra, specifically sum of products and product of sums. I know it has something to do with the distributive law, and possibly DeMorgan's laws, but I cannot figure it out. I'm stuck on a problem on my homework. The instructions are to multiply out and simplify to obtain a product of sums. The problem goes as follows: (A' + B + C')(A' + C' + D)(B' + D') I grouped the A' + C' together using the law (X + Y)(X + Z) = X + YZ and got A' + C' + BD(B'D') Then I thought I could distribute the BD to make it BDB' + BDD'. Using the X + (Embedded)