Bonjour pourriez vous m aider concernant ces exercices sur les expressions en math Merci bcp

Bonjour,

32)

a. 4 + (x - 3) * 5

= 4 + 5x- 15

= 5x - 11

b. 2x (x + 1) - x

= 2x² + 2x - x

= 2x² + x

c. - (4 - x) * 2

= - (8 - 2x)

= - 8 + 2x

= 2x - 8

d. 3 * (5x * 2) + 4

= 15x + 6 + 4

= 15x + 10

e. 3 * x + x * 2x + 3 * 4 + 2x * 4

= 3x + 2x² + 12 + 8x

= 2x² + 11x + 12

1)

a. 2x = 2 * - 2 = - 4

b. 7 + 5x = 7 + 5 * - 2 = 7 - 10 = - 3

c. x² = - 2² = 4

d. - x² = - (- 2)² = - 4

e. x³ = - 2³ = - 8

f. 4 - x = 4 - (- 2) = 4 + 2 = 6