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प्रश्न
Which of the following quadratic equations has real and distinct roots?
विकल्प
x2 + 2x = 0
x2 + x + 1 = 0
(x − 1)2 = 1 − 2x
2x2 + x + 1 = 0
MCQ
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उत्तर
x2 + 2x = 0
Explanation:
x2 + 2x = 0
x(x + 2) = 0
x = 0, x = −2
x2 + 2x = 0
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