Question

( x+1 )²⁰²⁰ = ( x+1 )²⁰²¹

Answer 1

\(\left(x+1\right)^{2020}-\left(x+1\right)^{2021}=0\\ \left(x+1\right)^{2020}-\left(x+1\right)^{2020}.\left(x+1\right)=0\\ \left(x+1\right)^{2020}\left(1-x-1\right)=0\\ \left(x+1\right)^{2020}.\left(-x\right)=0\\ \left[{}\begin{matrix}\left(x+1\right)^{2020}=0\\-x=0\end{matrix}\right.\\ =>\left[{}\begin{matrix}x=-1\\x=0\end{matrix}\right.\)

Answer 2

`-> (x+1)^2021 - (x+1)^2020=0`

`-> (x+1)^2020(x+1 - 1) = 0`

`-> x + 1 = 0` hoặc `x = 0`

`-> x = -1` hoặc `x =0`