Réponses

2013-05-08T10:19:32+02:00

A = 3(2x - 6) - (3 - 5x)

A = 6x - 18 - 3 + 5x

A = 11x - 21

 

B = (5 - 2y) - (-3y + 7)

B = 5 - 2y + 3y - 7

B = y - 2

 

C = 4(6 + z) + (z - 3)(2 - z)

C = 24 + 4z + 2z  - z² - 6 + 3z

C = -z² + 9z + 18

 

D = (2t - 5)(3t + 2) - (t² + 6)

D = 6t² + 4t - 15t - 10 - t² - 6

D = 5t² - 11t - 16

2013-05-08T10:22:23+02:00

A= 11x (c'est un x)-21

 

B= 1y-2

 

C= z²+9z+18

 

D= 5t²-11t-16