Matematika

Pertanyaan

1. 3x² - 7x + 4 = 0

2. 2x² - (x - 3)² = -2

2. 6x² + 7x - 5 = 0

1 Jawaban

  • 1. 3x^2 - 7x + 4=0
         x^2 - 7x + 12=0
         (x-4)   (x-3)
        x+4/3   x+3/3=1

    2. 2x^2 - (x-3)^2 = -2
        2x^2 - (x^2 - 6x +9) = -2
        2x^2 - x^2 + 6x -9 +2 = 0
          x^2 + 6x -7=0
          (x+7)   (X-1)
         x= -7    x= 1

    3.6x^2 + 7x - 5 =0

    x^2 + 7x - 30 = 0

    (x+10) (X-3)

    x= - 10/6    x= 3/6

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