bonjour exercice 26 please merciii

Réponse :

1.

a) 3

b) -2

c) 1

d) -1

e) 0

f) -1

2. Oui car 3 + (-2) + 1 + (-1) + 0 + (-1) = 0

bonjour,

a = - 3 x - 6

a =  - 3 ( - 3) - 6  = 9 - 6  = 3

b = 2 x + 4

b = 2 * - 3 + 4 = - 6 + 4 = - 2

c =   ( x + 2 )² =  x² + 4 x + 4

c = ( - 3)² + 4*- 3 + 4 = 9 - 12 + 4 =  1

d = ( - 3)² + 2 *- 3 - 4 =  9 - 6 - 4 = - 1

e = x² + 3 x  

e = ( - 3 )² + 3 ( -3)  = 9 - 9 = 0

f = - 10 - 3 ( -3)

f = - 10 + 9 = - 1

3 - 2 + 1 - 1 - 1  = 4 - 4 = 0