Cứu vs helpppppppppp

`22)(x-2)/(x+1) .(x^2-2x-3)/(x^2-5x+6)(xne-1;xne2;xne3)`

`=(x-2)/(x+1) .(x^2-3x+x-3)/(x^2-2x-3x+6)`

`=(x-2)/(x+1) .((x-3)(x+1))/((x-2)(x-3))`

`=1`

`23)(x+1)/(x^2-2x-8) .(4-x)/(x^2+x)(xne0;xne-1;xne-2;xne4)`

`=(x+1)/(x^2-4x+2x-8) .(4-x)/(x(x+1))`

`=1/((x+2)(x-4)) .(-(x-4))/x`

`=-1/(x(x+2))`

`=-1/(x^2+2x)`

`24)(x^2+2)/(4x+24) .(x^2-36)/(x^2+x-2)`

`=(x^2+2)/(4(x+6)) .((x-6)(X+6))/(x^2+2x-x-2)`

`=(x^2+2)/4  . (x-6)/((x+2)(x-1))`

`=((x^2+2)(x-6))/(4(x+2)(x-1))`

`25)(x^3-8)/(5x+20).(x^2+4x)/(x^2+2x+4)`

`=((x-2)(x^2+2x+4))/(5(x+4)).(x(x+4))/(x^2+2x+4)`

`=(x(x-2))/5`

`26)(x-3)^3/(3x^2) :(x^2-6x-9)/(6x)`

`=(x-3)^3/(3x^2) .(6x)/(x-3)^2`

`=(x-3)/x . 2`

`=(2x-6)/x`

`27)(x^2+x)/(5x^2-10x+5) :(3x+3)/(5x-5)`

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

`=x/(x-1) .1/3`

`=x/(3x-3)`

`28)(6x-3)/(5x^2+x) :(1-8x^3)/(25x^2+10x+1)`

`=(3(2x-1))/(x(5x+1)) . (5x+1)^2/(-(2x-1)(4x^2+2x+1))`

`=3/x . (5x+1)/(-(4x^2+2x+1))`

`=-(15x+3)/(4x^3+2x^2+x)`

`29)(x^2+2x+1)/(x^3-1) :(x+1)/(2x^2+2x+2)`

`=(x+1)^2/((x-1)(x^2+x+1)) . (2(x^2+x+1))/(x+1)`

`=(x+1)/(x-1) .2`

`=(2x+2)/(x-1)`

`30)(x+2)/(x^2-5x+6) :(x^2+3x+2)/(x-2)`

`=(x+2)/(x^2-2x-3x+6) .(x-2)/(x^2+2x+x+2)`

`=(x+2)/((x-2)(x-3)).(x-2)/((x+2)(x+1))`

`=1/(x-3) .1/(x+1)`

`=1/(x^2-2x-3)`