Matematika

Pertanyaan

tolong dong

1.) |2x+6|=|x-2|
2.) |x-2|=|2x+3|

1 Jawaban

  • Bab Nilai Mutlak
    Matematika SMA Kelas X

    1] |2x + 6| = |x - 2|
     
        2x + 6 = x - 2
        2x - x = -2 - 6
        x = -8

       2x + 6 = - x + 2
       2x + x = 2 - 6
       3x = - 4
       x = -4/3

       HP = { -4/3, 8 }

    2] |x - 2| = |2x + 3|
      
        x - 2 = 2x + 3
        x - 2x = 3 + 2
        -x = 5
        x = -5

        x - 2 = - 2x - 3
        x + 2x = -3 + 2
        3x = -1
        x = -1/3

       HP = { -5, -1/3 }

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