Matematika

Pertanyaan

Himpunan penyelesaian dari persamaan 3|x-4|+5=19

1 Jawaban

  • Bab Nilai Mutlak
    Matematika SMA Kelas X

    3 |x - 4| + 5 = 19
    3 |x - 4| = 19 - 5
    3 |x - 4| = 14
    |x - 4| = 14/3

    (x - 4)² = (14/3)²
    (x - 4)² - (14/3)² = 0
    (x - 12/3 + 14/3) (x - 12/3 - 14/3) = 0
    (x + 2/3) (x - 26/3) = 0
    x + 2/3 = 0
    x = -2/3

    x - 26/3 = 0
    x = 26/3

    HP = { -2/3, 26/3 }

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