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Home > A2C > Chapter 12 > Lesson 12.1.1 > Problem 12-11

12-11.
  1. Simplify. Homework Help ✎

    1. (2 + 3i)(2 − 3i) + (2 + 3i)2

4 − (−9) + 4 + 12i + (−9)

8 + 12i