What is the conjugate of 7 − 2i and the product z·z̄?

What is the conjugate of 7 − 2i and the product z·z̄?

A Conjugate 7 − 2i; z·z̄ = 45

B Conjugate −7 + 2i; z·z̄ = 53

C Conjugate 7 + 2i; z·z̄ = 53

D Conjugate 7 + 2i; z·z̄ = 49 − 4

Solution

Correct Answer: Option C