Bonjour, Aidez moi Svp :(

E = 10x² − 5x + 15
E = 5 × 2x² − 5x + 5 × 3
F = 4x² + 7x
F = 4x × x + 7x
G = 9x²(x + 1) + 6x(5 + x)
G = 3x × 3x(x + 1) + 2 × 3x (5 + x)
H = (11x − 3)² + (11x − 3)(5 + 9x)
H = (11 x − 3) (11x − 3) + ( 11 x − 3) (5 + 9x)