Bonjour,

Exercice 6 :

a) x² = 4

x = √4

x = 2

b) x² = 121

x = √121

x = 11

c) 3x² = 48

x² = 48 / 3 = 16

x = √16

x = 4

d) -2x² = -32

-2x² / -2 = -32 / -2

x² = 16

x = √16

x = 4

d) Il n'y a pas d'erreur ?

f) -4x² = -12

-4x² / -4 = -12 / -4

x² = 3

x = √3