Question

Phân tích đa thức thành nhân tử : x² – x – 2020*2021

Answer 1

\(x^2-x-2020.2021=x^2+2020x-2021x-2020.2021=x\left(x+2020\right)-2021\left(x+2020\right)=\left(x+2020\right)\left(x-2021\right)\)

Answer 2

\(x^2-x-2020\cdot2021\)

\(=\left(x-2021\right)\left(x+2020\right)\)