分解因式(x²-6x+9/x²-9)+(x³-4x²+4x/x²+3x）快点啊,

分解因式(x²-6x+9/x²-9)+(x³-4x²+4x/x²+3x）
快点啊,

原式=(x-3)²/(x+3)(x-3)+x(x²-4x+4)/x(x+3)
=(x-3)/(x+3)+(x²-4x+4)/(x+3)
=(x-3+x²-4x+4)/(x+3)
=(x²-3x+1)/(x+3)

(x²-6x+9/x²-9)+(x³-4x²+4x/x²+3x）
=(x-3)²/(x-3)(x+3)+x(x-2)²/x(x+3)
=(x-3)/(x+3)+(x-2)²/(x+3)
=(x-3+x²-4x+4)/(x+3)
=(x²-3x+1)/(x+3)

额，真不会，讨厌那个东西，烦死了