himpunan penyelesaian dari l2x - 1l = l4x + 3l adalah...

| 2x-1 | = | 4x+3 |
. . . . . . . . . . . . . . . . . . . . . .
√(2x-1)^2 = √(4x+3)^2
(2x-1)^2 = (4x+3)^2
4x^2 - 4x + 1 = 16x^2 + 24x + 9
4x^2 - 16x^2 - 4x -24x = 9 - 1
-12x^2 - 28x = 8
-12x^2 - 28x - 8 = 0
12x^2 + 28x + 8 = 0
________________ : 4
3x^2 + 7x + 2 = 0
(3x + 1) (x + 2)
x = -3 dan x = -2

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