Simplify: (6x2−4x+3)−(3x2−4x+3)(6x^2 - 4x + 3) - (3x^2 - 4x + 3)(6x2−4x+3)−(3x2−4x+3).
3x23x^23x2
3x2−8x+63x^2 - 8x + 63x2−8x+6
3x2+8x3x^2 + 8x3x2+8x
9x29x^29x2