Verified answer

bjr

5x + 9 - 3 + 2x = 5x + 2x + 9 - 3 = 7x + 6

4t x 3 + 6t = 12t + 6t   tu termines

12x - 6x   - tu sais le faire

8x - 2x + 3    - rien à faire

3 (5x+3x) = 3 * 8x = 24x

2 (7 + 30t) =

comme tu sais que k (a+b) = ka + kb

donc 2 (7 + 30t) = 2*7 + 2*30t = 60t + 14

(3x² + 5) x 5  idem

5*3x² + 5*5 = 15x² + 25

10 (5a + 2) = 10*5a + 10*2    termine

:)

Verified answer

Réponse :

Bonjour

Explications étape par étape

A = 5x + 9 - 3 + 2x

A = 7x + 6

B = 4t x 3 + 6t

B = 12t + 6t

B = 18t

C = 12x - 6x

C = 6x

D = 8x^2 - 2x + 3

D = pas simplifiable

A = 3 *(5x + 3x)

A = 3 * 8x

A = 24x

B = 2 * (7 + 30t)

B = 14 + 60t

C = (3x^2 + 5) x 5

C = 15x^2 + 25

D = 10 * (5a + 2)

D = 50a + 20