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Home > A2C > Chapter 9 > Lesson 9.2.3 > Problem 9-111

9-111.
  1. Show that each of the following equations is true. Homework Help ✎

    1. (i − 3)2 = 8 − 6i

    2. (2i − 1)(3i + 1) = −7 − i

    3. (3 − 2i)(2i + 3) = 13

Start by multiplying.
i 2 − 6i + 9 = 8 − 6i

i 2 = −1, so i 2 − 6i + 9 = −1 − 6i + 9 = 8 − 6i

See part (a).

See part (a).