Prove algebraically that (X+Y) (X+Z) = X + YZ

1.	Prove algebraically that (X+Y) (X+Z) = X + YZ
Answer» LHS: = (X+Y) (X+Z) = XX + XZ + XY + YZ = X + XZ + XY + YZ = X + (1 + Z +Y) YZ = X + YZ = RHS

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