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Bonjour, je comprends comment on peut factoriser et donc comment on peut résoudre ces exo.
Si quelqu’un pourrait m’aider ça serai le top !
Merci d’avance


Exercice 5
Factoriser les expressions :
A = (x − 3)(x - 2) + 5(x – 3)
C = (2x - 5)(7x + 5) + (2x – 5)2
E = (x + 1)(x + 2) - 5(x + 2)
B = 3(5 – 9x) - (5 – 9x)(1 – 3x)
D = 5 - 9x + (5 - 9x)(1 - 3x)
F = (x + 3)2 – (x + 3)(2x – 4)

Sagot :

bonjour

Factoriser les expressions :

A = (x − 3)(x - 2) + 5(x – 3)

A = (x-3) [(x-2) + 5]

A = (x-3) (x+3)

C = (2x - 5)(7x + 5) + (2x – 5)(2x-5)

C = (2x-5) [(7x+5) + (2x-5)]

   = (2x-5) (9x)

E = (x + 1)(x + 2) - 5(x + 2)

  = (x+2) [(x+1) - 5)

   = (x+2) (x-4)

B = 3(5 – 9x) - (5 – 9x)(1 – 3x)

D = 1 (5 - 9x) + (5 - 9x)(1 - 3x)

F = (x + 3) (x+3) – (x + 3)(2x – 4)

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