Réponses

2013-04-27T12:11:02+02:00

1) A = 3x -7x²+6x-2

A = -7x²+9x -2

 

B

= 7+4x+3-2x²

= -2x² +4x +10

 

pour x = 1

A = -7+9-2 = 0

 

pour x = -1

B = -2-4+10 = 6