Matematika

Pertanyaan

1. 7a(4a-3b+5c)
2. -3×(6×-2y+4z
3. (4×+2y)(5×+7y)

2 Jawaban

  • 1) 7a(4a - 3b+5c) = 28a² - 21ab + 35ac

    2) -3x (6x - 2y + 4z) = -18x² + 6xy - 12xz

    3) (4x + 2y) (5x + 7y) = 20x² + 28xy + 10xy + 14y²
                                       = 20x² + 38xy + 14y²
  • 1. 7a (4a-3b+5c)
    = 28 a kuadrat - 21 ab + 35ac

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