Đáp án:
Bn tham khảo
Giải thích các bước giải:
* `(x^2 - 4x + 4) - y^2`
`= (x - 2)^2 - y^2`
`= (x - 2 - y)(x - 2 + y)`
* `16y^2 - 9x^2`
`= (4y)^2 - (3x)^2`
`= (4y + 3x)(4y - 3x)`
* `8x^3 - y^3`
`= (2x)^3 - y^3`
`= (2x - y)(4x^2 + 2xy + y^2)`
* `27x^3 - 8y^3`
`= (3x)^3 - (2y)^3`
`= (3x - 2y)(9x^2 + 6xy + 4y^2)`
* `27x^3 + 1`
`= (3x)^3 + 1^3`
`= (3x + 1)(9x^2 - 3x + 1)`
* `(x^2 - 2x + 1) - 9y^2`
`= (x - 1)^2 - (3y)^2`
`= (x - 1 - 3y)(x - 1 + 3y)`
* `16y^2 - (x^2 + 6x + 9)`
`= (4y)^2 - (x + 3)^2`
`= (4y - x - 3)(4y + x + 3)`
* `4x^2 - 25y^2`
`= (2x)^2 - (5y)^2`
`= (2x - 5y)(2x + 5y)`
Srudy well
