Giải bài toán rút gọn chỉ tiết hôn emmm vs ạ

`A=(sqrtA/(sqrtA+1) +sqrtA/(1-sqrtA) + (2sqrtA-4)/(A-1)) : 1/(sqrtA+1)`

`A=((sqrtA(sqrtA-1)-sqrtA(sqrtA+1) + 2sqrtA-4))/((sqrtA-1)(sqrtA+1)) * (sqrtA+1)`

`A=(A-sqrtA-A-sqrtA+2sqrtA-4)/(sqrtA-1)`

`A=4/(sqrtA-1)`

`B=(2sqrtx)/(sqrtx+3) -sqrtx/(3-sqrtx) -(3x+9)/(x-9)`

`B=(2sqrtx(sqrtx-3) + sqrtx(sqrtx+3) - (3x+9))/((sqrtx-3)(sqrtx+3))`

`B=(2x-6sqrtx+x +3sqrtx -3x -9)/((sqrtx-3)(sqrtx+3))`

`B=(-3sqrtx-9)/((sqrtx-3)(sqrtx+3))`

`B=(-3(sqrtx+3))/((sqrtx-3)(sqrtx+3))`

`B=(-3)/(sqrtx-3)`

`C=((sqrtx)/3 - (2sqrtx-3)/sqrtx) * (sqrtx/(sqrtx+3) + (x+9)/(9-x))`

`C=(x-6sqrtx+9)/(3sqrtx) * (sqrtx(sqrtx-3) - x-9)/((sqrtx-3)(sqrtx+3))`

`C=((sqrtx-3)^2)/(3sqrtx) * ( x-3sqrtx-x-9)/((sqrtx-3)(sqrtx+3)`

`C=((sqrtx-3)^2*(-3sqrtx-9))/(3sqrtx(sqrtx-3)(sqrtx+3))`

`C=-(sqrtx-3)^2/(3sqrtx(sqrtx+3))`

`C=(-x + 6sqrtx-9)/(3x+9sqrtx)`