Đáp án:
tham khảo
Giải thích các bước giải:
`1)`
`a//` `2x-3` `≤` `3x+6`
`=>` `2x-3-6` `≤` `3x`
`=>` `2x-9` `≤` `3x`
`=>` `9` `≤` `2x-3x`
`=>` `9` `≤` `-x`
`=>` `-9` `≤` `x`
$\\$
`b//` `4(x-1)` `≥` `3x-5`
`=>4x-4` `≥` `3x-5`
`=>4x-4+5` `≥` `3x`
`=>4x+1` `≥` `3x`
`=>4x-3x` `≥` `-1`
`=>x` `≥` `-1`
$\\$
`2)`
`a//` `3x(x-2)+1/4(x-1)`
`=>3x^2-6x+1/4x-1/4`
`=>3x^2-(6x-1/4x)-1/4`
`=>3x^2-23/4x-1/4`
$\\$
`b//` `4(x-1)+3/2(6x-3x)`
`=>4x-4+3/2(3x)`
`=>4x-4+9/2x`
`=>(4x+9/2x)-4`
`=>17/2x-4`
