BrainMass Quizzes Multiplying Complex Numbers This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form. 1 Multiply 4 (3 - 2i) 12 + 8i 12 - 2i 12 - 8i -12 - 8i 12 + 2i 2 4i (5 + i) -4 + 20i 4 + 20i 20 - 4i 4 - 20i -20 + 4i 3 (2 - 6i)(3 - 2i) 6 - 22i -6 - 22i 6 + 22i 18 - 22i -18 - 22i 4 (2 - 3i)(2 + 3i) -13 13 - 12i -13i 13 -13 + 12i 5 (4 + i)(4 + i) 15 15 + 8i 3 - 8i -15 15 - 8i Submit Quiz