Đáp án:
`m^3 + 3^3`
`= (m + 3)(m^2 - m.3 + 3^2)`
`= (m + 3)(m^2 - 3m + 9)`
`x^6 + 1`
`= (x^2)^3 + 1^3`
`= (x^2 + 1)[(x^2)^2 - x^2 .1 + 1^2]`
`= (x^2 + 1)(x^4 - x^2 + 1)`
`x^9 + 1`
`= (x^3)^3 + 1^3`
`= (x^3 + 1)[(x^3)^2 - x^3 . 1 + 1^2]`
`= (x^3 + 1)(x^6 - x^3 + 1)`