2 câu trả lời
Đáp án:
`x^4+2022x^2+2021x+2022`
`=(x^4+x^3+x^2)+(2021x^2+2021x+2021)-(x^3-1)`
`=x^2.(x^2+x+1)+2021.(x^2+x+1)-(x-1).(x^2+x+1)`
`=(x^2+x+1).(x^2+2021-x+1)`
`=(x^2+x+1).(x^2-x+2022)`
$#dariana$
`x^4+2022x^2+2021x+2022`
`=x^4+x^3-x^3+2021x^2+x^2+2021x+2021+1`
`=x^4+x^3+x^2+2021x^2+2021x+2021-x^3+1`
`=(x^4+x^3+x^2)+(2021x^2+2021x+2021)-(x^3-1)`
`=x^2(x^2+x+1)+2021(x^2+x+1)-(x-1)(x^2+x+1)`
`=(x^2+x+1)(x^2+2021-x+1)`
`=(x^2+x+1)(x^2-x+2022)`