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1) x1 + x2 < 0
2) x1. x2 > 0
3) D ≥ 0
Syarat 1:
Syarat 2:
Ambil irisannya, didapat:
m > 0
Syarat 3:
Ambil irisan dengan Syarat 3, didapat:
0 < m ≤ 1