Help meeeeeeeeeeeeee

Đáp án `+` Giải thích các bước giải:

`(3x^2 - 12x + 12)/(x^4 - 8x) (x ne 0; x \ne 2)`

`= (3(x^2 - 4x + 4))/(x (x^3 - 8))`

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

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

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

``

`(9 - (x+5)^2)/(x^2 + 4x + 4) (x \ne 2)`

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

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

`= ((-x - 2)(x + 8))/((x + 2)^2)`

`= (-(x + 2)(x + 8))/((x + 2)^2)`

`= -(x + 8)/(x + 2)`

``

`(x^2 - 4x + 4)/(x^2 - 7x + 10) (x \ne 2; x \ne 5) `

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

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

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