Matematika

Pertanyaan

jika a=-3 b=5 dan c=-2 tentukan : A.3abc , B.2b-5c , C.4a-3b-2c , D.3a²b²-ac²

1 Jawaban

  • A) 3abc
    =3(-3)(5)(-2)
    =90
    B) 2b-5c
    =2(5)-5(-2)
    =10+10
    =20
    C)4a-3b-2c
    =4(-3)-3(5)-2(-2)
    =-12-15+4
    =-27+4
    =-23
    D) 3a²b²-ac²
    =3(-3)²(5)²-(-3)(-2)²
    =3(9)(25)-(-3)(4)
    =675+12
    =687

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