Question

Multiply (6 + 2i)(6 − 2i)

Answer 1

Answer:

36-4i

Step-by-step explanation:

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

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

=36-12i+12i-4i

=36-4i

Answer 2

Answer:

40

Step-by-step explanation:

Things to know

$i = \sqrt{ - 1} \\ {i}^{2} = - 1$

Step 1.

Opening the parentheses.

$= 36 - 12i + 12i - 4 {i}^{2} \\ = 36 - 4( - 1) \\ = 36 + 4 \\ = 40$