B = (3x - 2)²
E = (7-4x) (7 +4x)
H=(x + √5)²
n°8 : A = (2x + 5)²
D = (6x + 10)²
G=(x + √5) (x - √5)
K = (²x + ²)²
L = (²x + ²)²
C= (2x + 3) (2x - 3)
F = (3-10x)²
1=(x-√√7)²
M = (²x + ³)(²x - ³)