Question

Multiply (6 + 2i)(6 - 2i)

Answer 1

4i^2 - 36

Explanation:

(6+2i)(6-2i)

(2i * 2i) = 4i^2

(2i * -6) = -12i

(2i * 6) = 12i

(-6 * 6) = -36

combine like terms

4i^2 - 36

Answer 2

40

Explanation:

(6 + 2i)(6 - 2i)=40