Matematika

Pertanyaan

tentukan hasil perkalian berikut :
a. 5x²(6x-3y)
b. (2x-2)(x+5)
c. (x-5)(x²-4x+20)

2 Jawaban

  • a. 60x³ - 15x²y
    b.2x² + 8x - 10
    c. x³ - 9x² - 100
  • 5 x^{2} (6x-3y) = 30 x^{3} -16 x^{2} y
    (2x-2)(x+5)= 2 x^{2} +10x-2x-10=2 x^{2} +8x-10
    (x-5)( x^{2} -4x+20) =  x^{3} -4 x^{2} +20x-5 x^{2} +20x -100 =  x^{3} -4 x^{2} -5 x^{2}+20x+20x-100 = x^{3}-9x^{2}-100

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