a. 15ac + 14ac = b. 23xy - 35xy = c. 2a² + 8a² = d. 7x2- 12x² = e. 7ab + 5ba = f. 9,8yz - 15zy = g. 11v2 - 5 - 3y2 + 13 = h. 2b2 - 8b-9b2 + 6b = Bonjour pouvez

Bonjour,

15ac + 14ac = (15 + 14)ac = 29ac

23xy - 35xy = (23 - 35)xy = .......

2a² + 8a² = (2 + 8)a² = 10a²

7x² - 12x² = (7 - 12)x² = .......

7ab + 5ba = (7 + 5)ab = 12ab

9.8yz - 15zy = (9.8 - 15)yz = -5.2yz

11y² - 5 - 3y² + 13 = (11 - 3)y² - 5 + 13 = 8y² + 8