Question

Explain: how and why? to the answer.
ans: -4​

Answer 1

Answer:

-4

Step-by-step explanation:

i^19 can be written as i^20/i = 1/i = -i;

(1/i)^25 can be written as 1/i^24 * 1/i = 1/i = -i (1/i^24 = 1)

(-i -i)² = (-2i)² = -4

I hope this is clear to you now..

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