Mathématiques

Question

(-7x-6)(x+5)+(8x-9)(2x+10)

2 Réponse

  • (-7x-6)(x+5)+(8x-9)(2x+10)
    =
    (-7x-6)(x+5)+2(8x-9)(x+5)
    =(x+5)(-7x-6+16x-18)
    =(x+5)(9x-24)
  •  (-7x-6)(x+5)+(8x-9)(2x+10) =  (-7x-6)(x+5)+2(8x-9)(x+5)
    (x+5)[(-7x-6)+2(8x-9)]
    = (x + 5)(9x - 24)
    = 3(x +5)(3x - 8) 

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