Répondre :
(4x-3)² -(x+2)²
=16x²-24x+9-(x²+4x+4)
=16x²-24x+9-x²-4x-4
=15x²-28x+5
2x(x+3)(x+3)(x+1)
=16x²-24x+9-(x²+4x+4)
=16x²-24x+9-x²-4x-4
=15x²-28x+5
2x(x+3)(x+3)(x+1)