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9-35.
  1. If a = 2 + 3i and b = 1 – i, complete each of the following operations: Homework Help ✎

    1. a + b

    2. ab

    3. ab

Substitute the given expressions for a and b appropriately and combine like terms.

Follow the same method from part (a).
Don't forget to distribute the negative/minus sign.

Expand as you would any other polynomial.

5 + i