hpt cần gấp...............
a)$\left
\{ \begin{array}{}15\sqrt{5x-y}+22x+4y=15 \\ \sqrt{x-3y}-\sqrt{5x-y}=2
\end{array} \right.$ b)$\left
\{ \begin{array}{}\frac{4xy}{x+y}+\sqrt{x^{2}}-y^{2}=x+y \\ \sqrt{x+1}-\sqrt{1-y}=\sqrt{1-\frac{1}{x}}
\end{array} \right.$
Hệ phương trình
hpt cần gấp...............
\left
.15\sqrt{5x-y}+22x+4y=15
\begin{matrix} \\ \
end{matrix}\right\}\sqrt{x-3y}-\sqrt{5x-y}=2 \left
.\frac{4xy}{x+y}+\sqrt{x^{2}}-y^{2}=x+y
\begin{matrix} \\ \
end{matrix}\right\}\sqrt{x+1}-\sqrt{1-y}=\sqrt{1-\frac{1}{x}}
Hệ phương trình
hpt cần gấp...............
a)$\left
\{ \begin{array}{}15\sqrt{5x-y}+22x+4y=15 \\ \sqrt{x-3y}-\sqrt{5x-y}=2
\end{array} \right.$ b)$\left
\{ \begin{array}{}\frac{4xy}{x+y}+\sqrt{x^{2}}-y^{2}=x+y \\ \sqrt{x+1}-\sqrt{1-y}=\sqrt{1-\frac{1}{x}}
\end{array} \right.$
Hệ phương trình