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Sonbull [250]
3 years ago
9

HELP!!!! Simplify -2i x (-2i)

Mathematics
2 answers:
vredina [299]3 years ago
8 0

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.

zaharov [31]3 years ago
7 0

Answer:

- 4

Step-by-step explanation:

note that i² = (\sqrt{-1})² = - 1

- 2i × - 2i

= - 2 × - 2 × i² = 4 × - 1 = - 4


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