MAGAZSAFIA
Answered

Exercice 1: Développer et réduire chaque expression.
A = (9x - 8) X (-6x + 5)
B = (8x - 6)-(-11x -9)
C = 2x + 3x(-8x + 12)
D =(3x + 6)²
E = (7x – 9)x(9+ 7x)
F = (9x - 2)²

Merci d'avance​

Sagot :

Bonjour,

A = (9x - 8) X (-6x + 5)

= -54x²  +45x +48x  -40

= -54x² + 93x-40

B = (8x - 6)-(-11x -9)

= 8x - 6+11x + 9

= 19x +3

C = 2x + 3x(-8x + 12)

2x - 24x²  + 36x

= -24x²  +38x

D =(3x + 6)²

IR

= 9x²+36x +36

E = (7x – 9)x(9+ 7x)

IR

= 63x +49x²-81 -63x

= 49x² -81

F = (9x - 2)²

IR

= 81x² -36x +4