Matematika

Pertanyaan

a + b = 15, b+ c = 7, c + d = 8, ad + bc -ab - cd = ...

1 Jawaban

  • a = 12
    b = 3
    c= 4
    d = 4

    ad = a . d
    = 12 . 4
    = 48
    bc = b . c
    = 3 . 4
    = 12
    ab = a . b
    = 12 . 3
    = 36
    cd = c . d
    = 4 . 4
    = 16

    ad + bc - ab - cd = 48 + 12 - 36 - 16
    = 8


    maaf kalau salah

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