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Materi : Persamaan Nilai MutlakPembahasan :
Cara 1, Definisi Mutlak
|2x - 3| = 5
2x - 3 = 5 atau 2x - 3 = -5
2x = 5 + 3 atau 2x = -5 + 3
2x = 8 atau 2x = -2
x = 4 atau x = -1
Hp : {-1 , 4}
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Cara 2, Kuadratkan kedua ruas
|2x - 3| = 5
(2x - 3)² = 5²
(2x - 3)² - 5² = 0
(2x - 3 + 5)(2x - 3 - 5) = 0
(2x + 2)(2x - 8) = 0
x = -1 atau x = 4
Hp : {-1 , 4}