I = (2x - 5)² - (x - 3)²
J = (4x - 1)² - 3(2x + 5)(4x - 1)
K=4-(3-5x)²
L = 2(x-2)(x+3)(x-2)
M = -4x² + (3x + 1)²
N = 9(2x - 1)² - 4(x + 2)²

Factorisation svp​