通分：x^2 -6x+9分之x,2(3-x)分之1通分：x^2 -4分之1,4-2x分之x
2020-02-07
通分：x^2 -6x+9分之x,2(3-x)分之1
通分：x^2 -4分之1,4-2x分之x
优质解答
1、它们的最简公分母是2(x-3)²x/(x²-6x+9)=x/(x-3)²=2x/2(x-3)²1/2(3-x)=-1/2(x-3)=-(x-3)/2(x-3)²2、最简公分母是2(x+2)(x-2)1/(x²-4)=1/(x+2)(x-2)=2/2(x+2)(x-2)x/(4-2x)=-x/2(x-2...
1、它们的最简公分母是2(x-3)²x/(x²-6x+9)=x/(x-3)²=2x/2(x-3)²1/2(3-x)=-1/2(x-3)=-(x-3)/2(x-3)²2、最简公分母是2(x+2)(x-2)1/(x²-4)=1/(x+2)(x-2)=2/2(x+2)(x-2)x/(4-2x)=-x/2(x-2...