x-3分之1+6+2x分之1-x-x²-9分之6(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/07 09:14:17
x-3分之1+6+2x分之1-x-x²-9分之6(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6

x-3分之1+6+2x分之1-x-x²-9分之6(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6
x-3分之1+6+2x分之1-x-x²-9分之6
(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6

x-3分之1+6+2x分之1-x-x²-9分之6(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6
(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6
=1/(x-3) +(1-x)/2(x+3) - 6/(x+3)(x-3)
=[2(x+3)+(1-x)(x-3)-12]/2(x+3)(x-3)
=(2x+6-x²+4x-3-12)/2(x+3)(x-3)
=(-x²+6x-9)/2(x+3)(x-3)
=-(x-3)²/2(x+3)(x-3)
=-(x-3)/2(x+3)
=(3-x)/(2x+6)