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Materi : Persamaan Nilai MutlakPembahasan :
Cara 1, Kuadratkan kedua ruas
|2x - 1| = |x + 3|
(2x - 1)² = (x + 3)²
(2x - 1)² - (x + 3)² = 0
(2x - 1 + x + 3)(2x - 1 - x - 3) = 0
(3x + 2)(x - 4) = 0
x = -2/3
x = 4
Hp : {-2/3 , 4}
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Cara 2, Definisi Mutlak
|2x - 1| = |x + 3|
2x - 1 = x + 3 atau 2x - 1 = -x - 3
2x - x = 3 + 1 atau 2x + x = -3 + 1
x = 4 atau 3x = -2
x = 4 atau x = -2/3
Hp : {-2/3 , 4}