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Mathematics

Answered

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

Answer :

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Answer:

21 + 220i

Step-by-step 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

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