Réponses

2013-05-15T15:41:26+02:00

a) (x + 1)(x + 6) = x² + 6x + x + 6

 

b) (x + 4)(2 + 3x) = 2x + 3x² + 8 + 12x

 

c) (3x + 1)(2x + 1) = 6x² + 3x + 2x + 1

 

d) (x + 7)(2x + 3) = 2x² + 3x + 14x + 21

2013-05-15T15:44:57+02:00

a)            (x + 1)(x + 6) = x² + 6x + x + 6

 

b)              (x + 4)(2 + 3x) = 2x + 3x² + 8 + 12x

 

c)               (3x + 1)(2x + 1) = 6x² + 3x + 2x + 1

 

d)              (x + 7)(2x + 3) = 2x² + 3x + 14x + 21