Matematika

Pertanyaan

a.(4x-5)(4x+5)
b.(x-2)(4-x)
c.(3x-1)(1-3x)

1 Jawaban

  • a.(4x-5)(4x+5)
    = (4x)² - (5)²
    = 16x² - 25

    b.(x-2)(4-x)
    = x(4) - x(x) - 2(4) - 2(-x)
    = -x² + 6x - 8

    c.(3x-1)(1-3x)
    = 3x(1) - 3x(3x) - 1(1) + 1(3x)
    = -9x² + 6x - 1

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