defence exam SSB Head Constable (Communication) 2023 Mock Test Mathematics Quadratic Equations

If k ϵ (-∞, -2) ∪ (2, ∞), then the roots of the equation x2 + 2kx + 4 = 0 are

1
Complex
2
Real and unequal
3
Real and equal
4
One real and one imaginary
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