Bonjour Pourriez-vous m'aidez pour cet exercice sur les équations Merci d'avance

Bonsoir,

a) (x + 5)(x + 5) = 0

→ x + 5 = 0

x = 0 - 5

x = (-5)

b) (x - 7)(x - 7) = 0

→ x - 7 = 0

x = 0 + 7

x = 7b

c) (x - 1/2)(x - 1/2) = 0

→ x - 1/2 = 0

x = 0 + 1/2

x = 1/2

d) (2/5x - 3)(2/5x - 3) = 0

→ 2/5x - 3 = 0

2/5x = 0 + 3

2/5x = 3

2/5x = 15/5

2x = 15

x = 15 / 2

x = 7,5