1. © Oxford Fajar Sdn. Bhd. (008974-T) 2012 CHAPTER 4 COMPLEX NUMBERS Focus on Exam 4 1 1 + 2i 1 – i = 1 + 2i 1 – i 1 + i 1 + i = 1 + 2(i)2 + 2i + i 1 – i2 = 1…