Bonsoir,
Exo 3 :
A = 4x² + 4x + 4
A = (4x + 4)²
B = 5x² + 10x + 15
B = 5x² + 5*2x + 5*3
B = (5x + 3)²
D = 3y³ + y²
D = (3y + y) (3y - y)
E = 9 (x + 1) + x (x + 1)
E = 3² (x + 1) + x (x + 1)
E = 3 (x + 1) + [x (x + 1)]
E = 3 (x + 1) + 1
E = - 2 (x + 1)
[tex] \alpha [/tex]