द्विघात समीकरण ax2 + bx + c = 0 के कोई वास्तविक मूल नहीं होंगे, यदि विविक्तकर D = b2 - 4ac होगाः

1
D = 0
2
D > 0
3
D < 0
4
D ≥ 0

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