PRC-2 · Chapter 1 · Question 7 of 45
When using the quadratic formula to solve ax^2 + bx + c = 0, what does the expression under the square root sign represent?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: C) b^2 - 4ac
Explanation
The standard quadratic formula is x = (-b ± √(b^2 - 4ac)) / 2a. The core expression under the root, known as the discriminant, is b^2 - 4ac.
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