Which of the following is a quadratic equation?
A. \(x^3 - x^2 + 3 = 0\)
B. \(x^2 + 2x + 11 = 0\)
C. \((x + 2)^2 = x^2 + 5\)
D. \(5x - 7 = 0\)
1 answer
Best answer
Answer: B. \(x^2 + 2x + 11 = 0\)
A quadratic equation has degree 2. \((x+2)^2 = x^2 + 5\) simplifies to \(4x - 1 = 0\), which is linear; \(x^3 - x^2 + 3 = 0\) has degree 3.
Doubtly AI
· 24 Oct 2026
AI-verified · Oct 2026
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