Réponses

2013-02-23T11:38:36+01:00

A(x)= (2+x)(1-x)-3x(x-1)

= (1-x)(2+x+3x)

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

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


B(x)= 4(x-1)²-9(4x-4)

= 4(x-1)²-36(x-1)

= (x-1)(4x-4-36)

= (x-1)(4x-40)

= 4(x-1)(x-10)

 

En espérant t'avoir aidé.