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प्रश्न
Discuss the nature of the roots of the following quadratic equations : -2x2 + x + 1 = 0
उत्तर
-2x2 + x + 1 = 0
Here a = -2, b = 1, c = 1
∴ D = b2 - 4ac
= (1)2 - 4 x (-2) x 1
= 1 + 8
= 9
∵ D > 0
∴ Roots are real and distinct.
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