1)(x+4).(x+1)-3\(\sqrt{x^2+5x+2}\)=6
2)(\(^{x^2}\)+5x+4)\(\sqrt{x+3}\)=0
3)\(\left\{{}\begin{matrix}x-y=1\\x^2-xy+y^2=7\end{matrix}\right.\)
4)(x+1)\(\sqrt{x^2-2x+3}\)=\(^{x^2}\)+1
5)\(\left|4x+7\right|\)-2x-5=0
6)\(\sqrt{5x-1}\)=\(\sqrt{x}\)+4x-1
7)\(\sqrt{x^2+x-12}\)=8-x
8)\(\sqrt{x^2+2x+4}\)=\(\sqrt{2-x}\)