2x分之x^2乘以x^2+5x+6分之x^3-3x^2除以x^2+2x-3分之x^3-9x=x²/2x*(x³-3x²)/(x²+5x+6)÷(x³-9x)/(x²+2x-3)=x/2*x²(x-3)/(x+2)(x+3)*(x+3)(x-1)/x(x-3)(x+3)=x²(x-1)/[2(x+2...對(duì)嗎？？你不相信我，就不要求助我。肯定對(duì)。