The complex number i² equals:

A 1

B −1

C i

D 0

✓ Correct Answer: Option B

By definition, i = √(−1), so i² = −1.

💡 Why is B) the correct answer?

The correct answer to the question "The complex number i² equals:" is Option B: −1.

The other options — A) 1, C) i, D) 0 — are incorrect for this FE Exam Prep question. As explained above: By definition, i = √(−1), so i² = −1.

📚 About This FE Exam Prep Practice Question

This 1-level FE Exam Prep question from the Mathematics topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free FE Exam Prep practice test or use flashcards for spaced repetition review.

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The complex number i² equals:

✓ Correct Answer: Option B

📚 About This FE Exam Prep Practice Question

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