搜狗做题网解方程7{x-1}=2x=3
来源：学生作业帮助网 编辑：作业帮 时间：2024/06/25 06:32:43
2（x-2)(x+3)-(2x-5)(x-1)=3x+72（x²+x-6）-（2x²-7x+5）=3x+72x²+2x-12-2x²+7x-5=3x+79x-1
（x+1)/x²-3=1/xx+1-3x²=x3x²=1x²=1/3x=±(√3)/3再问：1/x^2-1+2/x+1=3/x-1再答：������������
两边乘(x+3)(x-2)6x+18=x²-2x-x²-x+66x+18=-3x+69x=-12x=-4/3经检验,x=-4/3是方程的解
x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1
2x(x-1)-x(3x+2)=-x(x+2)-122x^2-2x-3x^2-2x=-x^2-2x-122x^2-3x^2+x^2-2x-2x+2x=-12-2x+12=0-2(x-6)=0x-6=0
(x²-x+4)x-(x-1)(x²+2)=x+7x³-x²+4x-x³+x²-2x+2=x+72x+2=x+72x-x=7-2x=5
我给个思路吧（X+2-1/X+2)-(X+3-1/X+3)=（X+6-1/X+6)-(X+7-1/X+7)1-1/(X+2)-1+1/(X+3)=1-1/(X+6)-1+1/(X+7)剩下的就自己解决
2x²-x-3-x²-x+2=x²+7x²-2x-1=x²+72x=-8x=-4
7x-2x+3x=365x+3x=368x=36x=4.5
x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)
7/(x^2+x)+3/(x^2-x)=6/(x^2-1)7/x(x+1)+3/x(x-1)=6/(x-1)(x+1)分子分母同乘以x(x-1)(x+1),得7（x-1）+3（x+1)=6x10x-4
通分化简得到(x+1)(x+2)=(x+5)(x+6)3x+2=11x+308x=-28x=-7/2
（7-2+3）X=368X=36X=9/2
转换一下x^2=3X-2x≠0X≠2/3X^2-3X+2=0(x-2)(X-1)=0x=2X=1
首先由题意得x+1≠0,x+7≠0,x+5≠0,x+3≠0,即x≠-1,x≠-7,x≠-5,x≠-3,则先简化方程(x+1+1)/(x+1)+(x+7+1)/(x+7)=(x+5+1)/(x+5)+(
2(x-3)(x+5)=x^2+(x+2)(x-2)+(x+7)2(x^2+2x-15)=x^2+x^2-4+x+72x^2+4x-30=2x^2+x+33x=33x=11
(1/x-7)+(1/x-1)=(1/x-6)+(1/x-2)1/(X-7)-1/(X-6)=1/(X-2)-1/(X-1)(X-6-X+7)/[(X-7)(X-6)]=(X-1-X+2)/[(X-1
这个展开就行了哇.2*（x^2+x-6）-(2*x^2-7X+5)-3x-7=0化简得：6X=24x=4应该是对的.嘿嘿.
你好,我认真解答了这道题,看最终没有实数解啊.我希望能帮到你