Réponses

2013-03-08T10:05:09+01:00

1) Ddévelopper

A= (4x^2+4x+1) - (2x^2+6x+1x+3)

A= (4x^2+4x+1) - (2x^2+7x+3)

A= 4x^2+4x+1 - 2x^2 -7x-3

A= 2x^2-3x-2

 

C= (3x^2-1x+21x-7) - 3x+1 + (x^2+4x-4x-16)

C= 3x^2 + 20x -7 - 3x+1 + x^2-16

C= 4x^2 + 20x - 23

 

2) Factoriser

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

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