PRC-2 · Chapter 1 · Question 34 of 45
If the discriminant of a quadratic equation is exactly zero (b^2 - 4ac = 0), what can be concluded about its roots?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) The roots are real and equal (identical).
Explanation
When the discriminant is zero, the plus/minus part of the quadratic formula becomes zero, leaving only one unique value for x.
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