Bonjour,
Développer les expressions suivantes :
A = 2 (3 - x)
A = 6 - 2x
B = u (a + 2)
B = ua + 2u
C = - (4 + 3a)
C = - 4 - 3a
D = 2 (u + v)
D = 2u + 2v
E = 72 (-3 + x)
E = - 216 + 72x
Résoudre les equations suivantes :
a) x - 3 = 15
x = 15 + 3
x = 18
b) 8 - 2x = 0
- 2x = - 8
x = 8/2
x = 4
c) x/4 = 34
x = 34 * 4
x = 136
d) 50x = 1000
x = 1 000/50
x = 20
e) 7x + ( = 2 - 9x --> Incompréhensible