What is i² equal to? (where i = √−1)

A 1

B −1

C i

D −i

✓ Correct Answer: Option B

i = √(−1), so i² = (√(−1))² = −1.

💡 Why is B) the correct answer?

The correct answer to the question "What is i² equal to? (where i = √−1)" is Option B: −1.

The other options — A) 1, C) i, D) −i — are incorrect for this SAT Exam Prep question. As explained above: i = √(−1), so i² = (√(−1))² = −1.

📚 About This SAT Exam Prep Practice Question

This 2-level SAT Exam Prep question from the Math (No Calculator) 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 SAT Exam Prep practice test or use flashcards for spaced repetition review.

Practice SAT Exam Prep Quizzes → Browse All Questions Study Flashcards

What is i² equal to? (where i = √−1)

✓ Correct Answer: Option B

📚 About This SAT Exam Prep Practice Question

Related SAT Exam Prep Questions