1, 1/2x-1 + 3/12x-8=2/3x-2
2, 3/x+3 – 1/x-2=5/2x+6
3, 4/x-2 + x/x+1=x^2-2/x^2-x-2
4, x/x^2-1 + 3/x^2-2x-3=x/x^2-4x+3
1, 1/2x-1 + 3/12x-8=2/3x-2 2, 3/x+3 – 1/x-2=5/2x+6 3, 4/x-2 + x/x+1=x^2-2/x^2-x-2 4, x/x^2-1 + 3/x^2-2x-3=x/x^2-4x+3
By Amara
By Amara
1, 1/2x-1 + 3/12x-8=2/3x-2
2, 3/x+3 – 1/x-2=5/2x+6
3, 4/x-2 + x/x+1=x^2-2/x^2-x-2
4, x/x^2-1 + 3/x^2-2x-3=x/x^2-4x+3
1,1/2x-1+3/12x-8=2/3x-2
=1/2x-1 +3/4(3x-2)=2/3x-2
=1.4(3x-2)+3.(2x-1)/4.(3x-2)(2x-1)=2.4.(2x-1)/4.(3x-2)(2x-1)
=12x-8+6x-3=16x-8
=x=3
2,3/x+3-1/2x-1=5/2x+6
= 3/x+3-1/x-2=5/2(x+3)
=3.2.(x-2)-1.2.(x+3)/2.(x+3)(x-2)=5.(x-2)/2.(x+3)(x-2)
=6x-12-2-6x=5x-10
=-5x=4
=x=-4/5
3,4/x-2+x/x+1=x^2-2/x^2-4x+3
=4(x+1)+x(x-2)/(x+1)(x-2)=x^2/(x+1)(x-2)
=4x+4+x^2-2x=x^2
=x=-2
Giải thích các bước giải:
`1, 1/2x-1+3/12x-8=2/3x-2`
`=1/2x-1 +3/4(3x-2)=2/3x-2`
`=1.4(3x-2)+3.(2x-1)/4.(3x-2)(2x-1)=2.4.(2x-1)/4.(3x-2)(2x-1)`
`=12x-8+6x-3=16x-8`
`x=3`
`2, 3/x+3-1/2x-1=5/2x+6`
`= 3/x+3-1/x-2=5/2(x+3)`
`= 3.2.(x-2)-1.2.(x+3)/2.(x+3)(x-2)=5.(x-2)/2.(x+3)(x-2)`
`= 6x-12-2-6x=5x-10`
`=-5x = 4`
`=x=-4/5`
`3, 4/x-2+x/x+1=x^2-2/x^2-4x+3`
`=4(x+1)+x(x-2)/(x+1)(x-2)=x^2/(x+1)(x-2)`
`=4x+4+x^2-2x=x^2`
`=x=-2`