Tentukan nilai x yg memenuhi : I2x+4I = Ix-1I

| 2x + 4 | = | x - 1 |
Kuadratkan kedua ruas
4x² + 16x + 16 = x² - 2x + 1
3x² + 18x + 15 = 0
x² + 6x + 5 = 0
(x + 5)(x + 1) = 0

x = -5
x = -1

Hp = {-5,-1}

Bab Nilai Mutlak
Matematika SMA kelas X

|2x + 4| = |x - 1|

2x + 4 = x - 1
2x - x = -1 - 4
x = -5

2x + 4 = -x + 1
2x + x = 1 - 4
3x = -3
x = -1

HP = {-5, -1}