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Problem 8 - Entrance Test
The quadratic equation x² + 4x + k = 0 has real roots if k satisfies
A. k ≤ 4
B. k ≥ 4
C. k ≤ 2
D. k ≥ 2
Check Answer
Show Solution
Correct: A
Discriminant D = 16–4k ≥ 0 → 4k ≤ 16 → k ≤ 4.