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The roots of the quadratic equation 2x2 + x - 1 = 0 are
Real and equal
Real and unequal
Not real
None of these
Hence, the roots are real and equal.
The roots of the quadratic equation x2 - 4x + 4 = 0 are
The roots of the quadratic equation x2 + x + 1 = 0 are
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