Matematika

Pertanyaan

a.a = 2b + 3 dan 5a - 2b + 1 = 0

1 Jawaban

  • a = 2b + 3 >> a - 2b = 3
    5a - 2b + 1 = 0 >> 5a - 2b = 1

    a - 2b = 3 .... (1)
    5a - 2b = 1 .....(2)

    Eliminasi (-)

    -4a = 2
    a = -2/4
    a = -1/2

    >> a = -1/2
    a - 2b = 3
    (-1/2) -2b = 3
    -2b = 3 + (1/2)
    -2b = 7/2
    b = - 7/4

    a = -1/2
    b = -7/4

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