Ai làm hộ mik vs ạ sossss

Đáp án:

`1)` `x\in{5/12;1/12}`

`2)` `x\in{115/63;95/63}`

`4)` `x\in{1/5;-1/6}`

`5)` `x\in{3,2;1/4}`

`7)` `x=-1/3`

`8)` `x\in{4;-8/3}`

Giải thích các bước giải:

`1)`

`(x-1/4)^2=1/36`

`=>(x-1/4)^2=(1/6)^2` 

TH1: `x-1/4=1/6`

`=>x=1/6+1/4`

`=>x=5/12`

TH2: `x-1/4=-1/6`

`=>x=-1/6+1/4`

`=>x=1/12`

Vậy `x\in{5/12;1/12}`

`2)`

`|3x-5|-1/7=1/3`

`=>|3x-5|=1/3+1/7`

`=>|3x-5|=10/21`

TH1: `3x-5=10/21`

`=>3x=10/21+5`

`=>3x=115/21`

`=>x=115/21:3`

`=>x=115/63`

TH2: `3x-5=-10/21`

`=>3x=-10/21+5`

`=>3x=95/21`

`=>x=95/21:3`

`=>x=95/63`

Vậy `x\in{115/63;95/63}`

`4)`

`(5x-1)(2x+1/3)=0`

TH1: `5x-1=0`

`=>5x=1`

`=>x=1/5`

TH2: `2x+1/3=0`

`=>2x=-1/3`

`=>x=-1/3:2`

`=>x=-1/6`

Vậy `x\in{1/5;-1/6}`

`5)`

`0,2+|x-2,3|=1,1`

`=>|x-2,3|=1,1-0,2`

`=>|x-2,3|=0,9`

TH1: `x-2,3=0,9`

`=>x=0,9+2,3`

`=>x=3,2`

TH2: `x-2,3=-0,9`

`=>x=-0,9+2,3`

`=>x=1,4`

Vậy `x\in{3,2;1/4}`

`7)`

`2/3:x+6=4`

`=>2/3:x=4-6`

`=>2/3:x=-2`

`=>x=2/3:(-2)`

`=>x=-1/3`

Vậy `x=-1/3`

`8)`

`14-|(3x)/2-1|=9`

`=>|(3x)/2-1|=14-9`

`=>|(3x)/2-1|=5`

TH1: `(3x)/2-1=5`

`=>(3x)/2=5+1`

`=>(3x)/2=6`

`=>3x=6*2`

`=>3x=12`

`=>x=12/3`

`=>x=4`

TH2: `(3x)/2-1=-5`

`=>(3x)/2=-5+1`

`=>(3x)/2=-4`

`=>3x=-4*2`

`=>3x=-8`

`=>x=-8/3`

Vậy `x\in{4;-8/3}`