Question

9-9i
The product of the number and its conjugate is

Answer 1

162

Explanation:

`(9-9i)(9+9i)\\=9^(2) -81i+81i-81i^(2) \\=81 -81i^(2) \\=81 -81(-1)\\=81+81\\=162`

Hope this helps

Answer 2

Explanation:

(9+9i)(9-9i) = 81 - 81 i2 = 81 + 81 = 162