SITTAM13
Answered

Bonjour j'ai besoin d'aide svp
Factoriser :
D=(2x +3)(-4x +1)+(2x +3)(8-x)
E=(9x - 4)(2x +1)-(9x - 4)au carré ​

Sagot :

Bonjour

[tex]\rule{4cm}{1mm}[/tex]

D = (2x + 3)(-4x + 1) + (2x + 3)(8 - x)

D = (2x + 3)[(-4x + 1) + (8 - x)]

D = (2x + 3)(-4x + 1 + 8 - x)

D = (2x + 3)(-5x + 9)

E = (9x - 4)(2x + 1) - (9x - 4)²

E = (9x - 4)[(2x + 1) - (9x - 4)]

E = (9x - 4)(2x + 1 - 9x + 4)

E = (9x - 4)(-7x + 5)