Giải hệ phương trình:

1) \(\hept{\begin{cases}\sqrt[3]{x-y}=\sqrt{x-y}\\x+y=\sqrt{x+y+2}\end{cases}}\)

2) \(\hept{\begin{cases}x-\frac{1}{x}=y-\frac{1}{y}\\2y=x^3+1\end{cases}}\)

3) \(\hept{\begin{cases}\left(x-y\right)\left(x^2+y^2\right)=13\\\left(x+y\right)\left(x^2-y^2\right)=25\end{cases}\left(x;y\in R\right)}\)

4) \(\hept{\begin{cases}3y=\frac{y^2+2}{x^2}\\3x=\frac{x^2+2}{y^2}\end{cases}}\)

5) \(\hept{\begin{cases}x+y-\sqrt{xy}=3\\\sqrt{x+1}+\sqrt{y+1}=4\end{cases}\left(x;y\in R\right)}\)

6) \(\hept{\begin{cases}x^3-8x=y^3+2y\\x^2-3=3\left(y^2+1\right)\end{cases}\left(x;y\in R\right)}\)

7) \(\hept{\begin{cases}\left(x^2+1\right)+y\left(y+x\right)=4y\\\left(x^2+1\right)\left(y+x-2\right)=y\end{cases}\left(x;y\in R\right)}\)

8) \(\hept{\begin{cases}y+xy^2=6x^2\\1+x^2y^2=5x^2\end{cases}}\)

Giải hệ phương trình:

1.\(\hept{\begin{cases}x^2+y^2+xy=1\\x^3+y^3=x+3y\end{cases}}\)

2.\(\hept{\begin{cases}x+y=\sqrt{4z-1}\\y+z=\sqrt{4x-1}\\z+x=\sqrt{4y-1}\end{cases}}\)

3.\(\hept{\begin{cases}\left(x+y\right)\left(x^2-y^2\right)=45\\\left(x-y\right)\left(x^2+y^2\right)=85\end{cases}}\)

4.\(\hept{\begin{cases}x^3+2y^2-4y+3=0\\x^2+x^2y^2-2y=0\end{cases}}\)

5. \(\hept{\begin{cases}2x^3+3x^2y=5\\y^3+6xy^2=7\end{cases}}\)