ALEXIAPUBS13
Answered

Besoin d'aide, merci
Factoriser les expressions suivantes.
A=(x−1)(4x+5)+(x−1)(x+3)
B=(2x−2)(4x+8)+(x−3)(2x−2)
C=(x+1)(2x+3)−(x+1)(5x−9)

Sagot :

JODEVI

Réponse :

A= (x-1) ((4x+5)+(x+3))

  = (x +1) (4x+x +5+3)

  = (x +1) (5x+8)

B= (2x-2) ((4x+8)+(x -3))

  = (2x -2) (4x +x +8-3))

  = 2 (x -1) (5x+11)

C= (x +1) ((2x +3)-(5x -9)

  = (x +1) (2x -5x +3 +9)

  = (x +1) (-3x +12)

  = -3(x +1)(x -4)