CLAIRENASS
Answered

Factorisez lorsque cela est possible.

A(x) = (5x-1)* + 10x -2
B(x) = 9x + 6 - (3x+2)*
C(x) = (2x+5)(2-x) - 2+x
D(x) = x(x+2)-x-2

* = au carré

Sagot :

A(x) = (5x-1)* + 10x -2
       =(5x-1)(5x-1+2)
       =(5x-1)(5x+1)

B(x) = 9x + 6 - (3x+2)*
       =(3x+2)(3-3x-2)
       =(3x+2)(-3x+1)

C(x) = (2x+5)(2-x) - 2+x
       =(2-x)(2x+5-1)
       =(2-x)(2x+4)

D(x) = x(x+2)-x-2
       =(x+2)(x-1)