Question

( x +2 ) mũ 2 + |y -3| =0

tính x+ y

Answer 1

Ta có: \(\left\{{}\begin{matrix}\left(x+2\right)^2\ge0\\\left|y-3\right|\ge0\end{matrix}\right.\Rightarrow\left(x+2\right)^2+\left|y-3\right|\ge0\)

Mà \(\left(x+2\right)^2+\left|y-3\right|=0\)

\(\Rightarrow\left\{{}\begin{matrix}\left(x+2\right)^2=0\\\left|y-3\right|=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x+2=0\\y-3=0\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=-2\\y=3\end{matrix}\right.\Rightarrow x+y=-2+3=1\)

Vậy x + y = 1