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D = b²-4ac
b²-4ac < 0
(-4)²-4(m)(m+3) < 0
16-4(m²+3m) < 0
------------------ : 4
4 - (m²+3m) < 0
-m²-3m+4 < 0
-------------------- : -1
m²+3m-4 > 0
(m+4)(m-1) > 0
m= -4 dana m = 1
____ -4______1_____
uji bil '0' diantara -4 dan 1 pada pertidak samaan
0+3(0)-4 = -4 (negatif)
____-4 ------ 1____
sehingga Hp {-4 < m < 1 }