Mathematics · Quadratic Equations
Which of the following is a quadratic equation?
- 1-2x2 = (5 - x)(2x - 25)
- 2x3 - x2 = (x - 1)3✓
- 3(k + 1)x2 + 32x = 7, where k = -1
- 4x2 + 2x + 1 = (4 - x)2 + 3
Correct answer
x3 - x2 = (x - 1)3
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