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11-91.
  1. Multiply and simplify each expression. Homework Help ✎

    1. (3 + 2i)(4 + i)

    2. (2 + 3i)(2 − 3i)

    3. (5 − 2i)(5 + 2i)

    4. (a + bi)(abi)

Use an area model. Remember that i2 = −1.

12 + 3i + 8i + 2i2

10 + 11i

a2 + b2