1. Nilai x yang memenuhi |2x + 1|^2 - 6|2x - 1|-7 = 0 2. Nilai x yang memenuhi |x + 2|^2 - 4|x +2|-12< 0

1. |2x + 1|^2 - 6|2x - 1| - 7 = 0

4x^2 + 4x + 1 - 12x - 6 - 7 = 0
4x^2 + 4x - 12x + 1 - 6 - 7 = 0
4x^2 - 8x - 12 = 0
______________: 4
x^2 - 2x - 3 = 0
(x - 3) (x + 1)
x = 3 dan x = -1

2. |x + 2|^2 - 4|x+2| - 12 < 0

x^2 + 4x + 4 - 4x - 8 - 12 < 0
x^2 + 4x - 4x + 4 - 8 - 12 < 0
x^2 - 16 < 0
x^2 < 16
x < +/- √16
x < +/- 4
• x < 4
• x < -4