3.3.1 26 * 10 = 260

3.3.2 z = a + bi, |z| = sqrt(a^2 + b^2) = sqrt (a^2 + (-b)^2) = |z bar|

3.3.3 z = 12/7 + 5i

3.3.4 (a) z = 1 + i, z = -1 – i (b) z = 2 + 3i, z = -2 -3i (c) z 5 – i. z = -5 + i

3.3.5 (a) 1/5 (b) 1/5 (c) 5/13 (d) 5/13

3.3.6 (a) All non-zero imaginary numbers or all non-zero real numbers (b) all complex numbers satisfying z = a + ai or z = a – ai

3.3.7 x = +/- 3i