Bonsoir j'ai besoin d'aide pour cette exercice svp (exercice 2)

Bonsoir,

1)

a. 3x + 4x = x * 3 + x * 4 = (3 + 4)  * x = 7x

b. 6x - 5x = x * 6 - x * 5 = (6 - 5) * x = x

2)

a. 2x + x = 3x

b. 5x - 2x = 3x

c. 2x - x = x

d. 3x + 4 - 5x - 3 = 3x - 5x + 4 - 6 = - 2x + 1

Bonjour,

1) Factoriser

3x + 4x = 3 × x + 4 × x = (3 + 4) × x = 7x

6x - 5x = 6 × x - 5 × x = (6 - 5) × x = x

2) Réduire

2x + x = 3x

5x - 2x = 3x

2x - x = x

3x + 4 - 5x - 3 = -2x + 1