Question

What is the product of the complex numbers below?
(4-2i) (1 +7i)

Answer 1

B

Explanation:

Note that i² = - 1

Given

(4 - 2i)(1 + 7i) ← expand factors using FOIL

= 4 + 28i - 2i - 14i²

= 4 + 26i + 14

= 18 + 26i → B