Answer:
-4
Step-by-step explanation:
-2i times (-2i) can be rewritten as (-2)^2*i^2.
Recalling that i^2 = -1, we then have (-2)^2*(-1)
Completing this evaluation, we get -4.
- 4
note that i² = ([tex]\sqrt{-1}[/tex])² = - 1
- 2i × - 2i
= - 2 × - 2 × i² = 4 × - 1 = - 4
