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(x+4) (x-1) ≤ 0
x+4 ≤ 0
x ≤ -4
x-1 ≤ 0
x ≤ 1
jawaban D
karena x²+3x-4 < 0
a=1
b=3
c= - 4
c= bilangan1 x bilangan 2
-4 = 4 x -1
b= bilangan1 + bilangan 2
3 = 4 + (-1)
bilangan 4 dan -1
x-4=0
x=4
x-1=0
x=-1