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प्रश्न
Which of the following is a quadratic equation?
पर्याय
(x2 + 1) = (2 – x)2 + 3
x3 – x2 = (x – 1)3
2x2 + 3 = (5 + x)(2x – 3)
None of these
MCQ
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उत्तर
x3 – x2 = (x – 1)3
Explanation:
∵ x3 – x2 = (x – 1)3
⇒ x3 – x2 = x3 – 3x2 + 3x – 1
⇒ 2x2 – 3x + 1 = 0, which is a quadratic equation
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