Matematika

Pertanyaan

|3x+2| = 2
tlng dijawab ya beserta cara kerja dgn pengujiannya >_<

1 Jawaban

  • Bab Nilai Mutlak
    Matematika SMA Kelas X

    |3x + 2| = 2
    (3x + 2)² = 2²
    (3x + 2)² - 2² = 0
    (3x + 2 + 2) (3x + 2 - 2) = 0
    (3x + 4) 3x = 0
    3x + 4 = 0
    3x = -4
    x = -4/3

    atau

    3x = 0
    x = 0


    =====================
    pengujian
    =====================
    |3 . (-4/3) + 2| = 2
    |-4 + 2| = 2
    |-2| = 2
    2 = 2

    |3x + 2| = 2
    |0 + 2| = 2
    |2| = 2
    2 = 2

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