Question

Tìm x ϵ N biết:

( x + 1) ² = ( x + 1) ⁰ 

Answer 1

`(x+1)^2=(x+1)^0`

`(x+1)^2=1`

`(x+1)^1=1^2=(-1)^2`

\(\left[{}\begin{matrix}x+1=1\\x+1=-1\end{matrix}\right.\\ \left[{}\begin{matrix}x=0\\x=-2\end{matrix}\right.\)

Vậy `x=0;x=-2`.