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(-11-10i)^2 I just need to know the steps to get to the answer.
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3 votes
(-11-10i)^2
I just need to know the steps to get to the answer.

User Marco Borchert
by
3.9k points

1 Answer

3 votes

Answer:

21 + 220i

Explanation:

reminder that i² = - 1

(- 11 - 10i)²

= (- 11 - 10i)(- 11 - 10i) ← expand using FOIL

= 121 + 110I + 110I + 100I²

= 121 + 220I + 100(- 1)

= 121 + 220i - 100

= 21 + 220i

User Ameika
by
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