Matematika

Pertanyaan

tolong dong jawab nomor 1 sampai 3
tolong dong jawab nomor 1 sampai 3

1 Jawaban

  • Materi : Persamaan Mutlak

    Pembahasan :
    |x + 2| = 5

    x + 2 = 5
    x = 5 - 2
    x = 3

    x + 2 = -5
    x = -5 - 2
    x = -7

    Hp : {-7 , 3}

    ————————————————
    |x - 3| = 10

    x - 3 = 10
    x = 10 + 3
    x = 13

    x - 3 = -10
    x = -10 + 3
    x = -7

    Hp : {-7 , 13}

    ————————————————
    |3x - 5| = 3

    3x - 5 = 3
    3x = 3 + 5
    3x = 8
    x = 8/3

    3x - 5 = -3
    3x = -3 + 5
    3x = 2
    x = 2/3

    Hp : {2/3 , 8/3}