(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

If a,b,c,d [tex]\in[/tex] R, evaluate (a+b)(c+d). (R is a ring.

2. Relevant equations

3. The attempt at a solution

I think that it's simple foiling, but I'm not sure.

ac+ad+bc+bd

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# Homework Help: If in Ring, evaluate (a+b)(c+d)

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