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1. Homework Statement
If a,b,c,d [tex]\in[/tex] R, evaluate (a+b)(c+d). (R is a ring.
2. Homework Equations
3. The Attempt at a Solution
I think that it's simple foiling, but I'm not sure.
ac+ad+bc+bd
If a,b,c,d [tex]\in[/tex] R, evaluate (a+b)(c+d). (R is a ring.
2. Homework Equations
3. The Attempt at a Solution
I think that it's simple foiling, but I'm not sure.
ac+ad+bc+bd