解方程6 x-4x=1

(1)3x^2-10x-8=0十字相乘(3x+2)(x-4)=0x=-2/3,4(2)把(a^2+b^2)看成一个变量十字相乘(a^2+b^2-4)(a^2+b^2+2)=0因为a^2+b^2>=0a

解x(6-x)-2x(x+1)-(x³-3x^4)/x²=46x-x²-2x²-2x-(x-3x²)=44x-3x²-x+3x²=

4/(x-2)+(x-1)/[(x-2)(x-3)]-2/(x-3)=0[4(x-3)+(x-1)-2(x-2)]/[(x-2)(x-3)]=03(x-3)/[(x-2)(x-3)]=0不知道解了~~

x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1

(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

(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=(x/2)*(2/x(x+2))+(2/(x+2)(x+4))+.+2/(x+8)(x+10)=(x/2)*[1/x

2x（x-2）-6x（x-1）=4x（1-x）+16，2x2-4x-6x2+6x=4x-4x2+16，-2x=16，x=-8．

(x-3)(x-2)-(x-4)(x-1))/((x-1)(x-2))=((x-5)(x-4)-(x-6)(x-3))/((x-3)(x-4))2/((x-1)(x-2))=2/((x-3)(x-4)

整理得3X²-10x-8=0故（3x+2）（x-4）=0解得x=-2/3或x=4

2x+4x+6x...+100x=1-(x+3x+5x+...+99x)x(2+4+6+...+100)=1-x(1+3+5+...99)x(2+4+6+...+100)+x(1+3+5+...+99

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)

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)+(

2x+4x+6x+8x+...+2010x+2012x=1013042x+2x+3x+4x+...+1005x+1006x=5065211006*1007x/2=506521x=1013042/100

两边乘以x(x+1)(x-1)得7x-7+4x+4=6x5x=3x=3/5检验：x=3/5是方程的解∴方程的解为x=3/5

2x+4x+6x+8x~+2010x+2012x=1013042（2+2012)×1006÷2×x=1013042x=1再问：可以分解仔细点吗？再答：（2+2012)×1006÷2×x=1013042

1/x-7-1/x-5=1/x-6-1/x-41/x-7+1/x-4=1/x-6+1/x-5(x-4+x-7)/(x-7)(x-4)=(x-5+x-6)/(x-6)(x-5)(2x-11)/(x^2-

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

(1/x+4)+(1/x+6)=(1/x+3)+(1/x+7)1/(x+4)-1/(x+3)=1/(x+7)-1/(x+6)(x+3-x-4)/(x+4)(x+3)=(x+6-x-7)/(x+7)(x

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

1/x+6+1/x+4=1/x+7+1/x+31/x+6-1/x+7=1/x+3-1/x+41/(x+6)(x+7)=1/(x+3)(x+4)(x+3)(x+4)=(x+6)(x+7)x^2+7x+1