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Determine the nature of roots for the following quadratic equations.
| S.No | Quadratic equations | Value of discriminant | Nature of the roots |
| (i) | \(15x^2 + 11x + 2 = 0\) | \(\Delta =\) | |
| (ii) | \(x^2 - x - 1 = 0\) | \(\Delta =\) |
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