Bonjour, pouvez vous m’aider svp maths niveau seconde

Réponse:

bonjour

Explications étape par étape:

a. (x-4)² - 9 = 0

(x-4-3)(x-4+3) = 0

(x-7)(x-1) = 0

x = 7 x = 1

b. (x-4)² +6(x-4) = 0

(x-4)(x-4+6) = 0

(x-4)(x +2) = 0

x = 4 x = -2

c. (2x-3)² = 5(2x-3)

4x² -12x +9 = 10x -15

4x² -12x +9 -10x +15 = 0

4x² -22x +24 = 0

2x² -11x + 12 = 0

(2x-3)(x-4) = 0

2x -3 = 0 x -4 = 0

2x = 3 x = 4

x = 3/2