Question

What is the sum of the complex numbers 2 + 3i and 4 + 8i, where i =
−1
?

Answer 1

32 − 4i

Explanation:

Apply the FOIL method.

(2 + 3i)(4 − 8i) = (2)(4) + (2)(−8i) + (3i)(4) + (3i)(−8i) = 32 − 4i

Answer 2

-1, -4 because 2+3(-1)= -1 and 4+8(-1)= -4