Giúp mình bài hệ phương trình

[baoyenu911000]

rat cam on cac ban da doc va giup do minh bai hpt hom qua.
mong cac ban tiep tuc chi bao minh them.

giai he: \[2^x-2^y=x-y\] va \[x^2-xy+y^2=3\]

 

[canhchimnc]

\[{2}^{x}-{2}^{y}=x-y \Leftrightarrow {2}^{x}-x={2}^{y}-y \Rightarrow x=y\]

/*Plug back to the second equation.
easy to see that */
\[x=y=\sqrt{3} or x=y=-\sqrt{3}\]