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Verified answer
Materi : Nilai MutlakBahasan : Persamaan Nilai Mutlak
Jawaban : x = 4 atau x = 4/11
Langkah - langkah :
Rule : |f(x)| = a ⇒ f(x) = a atau f(x) = - a
|(3x + 8) / (2x - 3)| = 4, memiliki :
a. (3x + 8) / (2x - 3) = 4
⇒ 3x + 8 = 4(2x - 3)
⇒ 3x + 8 = 8x - 12
⇒ - 8x + 3x = - 12 - 8
⇒ - 5x = - 20
⇒ x = 4
b. (3x + 8) / (2x - 3) = - 4
⇒ 3x + 8 = - 4(2x - 3)
⇒ 3x + 8 = - 8x + 12
⇒ 8x + 3x = 12 - 8
⇒ 11x = 4
⇒ x = 4/11