What is the quadratic formula used to solve ax² + bx + c = 0?

A x = -b/2a

B x = (-b ± √(b² - 4ac)) / 2a

C x = -c/a

D x = b² - 4ac

✓ Correct Answer: Option B

The quadratic formula x = (-b ± √(b² - 4ac)) / 2a gives the roots of any quadratic equation ax² + bx + c = 0.

💡 Why is B) the correct answer?

The correct answer to the question "What is the quadratic formula used to solve ax² + bx + c = 0?" is Option B: x = (-b ± √(b² - 4ac)) / 2a.

The other options — A) x = -b/2a, C) x = -c/a, D) x = b² - 4ac — are incorrect for this IB Exam Prep question. As explained above: The quadratic formula x = (-b ± √(b² - 4ac)) / 2a gives the roots of any quadratic equation ax² + bx + c = 0.

📚 About This IB Exam Prep Practice Question

This 1-level IB 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 IB Exam Prep practice test or use flashcards for spaced repetition review.

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What is the quadratic formula used to solve ax² + bx + c = 0?

✓ Correct Answer: Option B

📚 About This IB Exam Prep Practice Question

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