1. Giải hpt: \(\left\{{}\begin{matrix}x+y+z=0\\2x+3y+z=0\\\left(x+1\right)^2+\left(y+2\right)^2+\left(z+3\right)^2=26\end{matrix}\right.\)
2. Cho x,y,z là nghiệm của hpt : \(\left\{{}\begin{matrix}\frac{x}{3}+\frac{y}{12}-\frac{z}{4}=1\\\frac{x}{10}+\frac{y}{5}+\frac{z}{3}=1\end{matrix}\right.\) . Tính \(A=x+y+z\)
Giải hpt:
\(\left\{{}\begin{matrix}4xy+4\left(x^2+y^2\right)+\frac{3}{\left(x+y\right)^2}=\frac{85}{3}\\2x+\frac{1}{x+y}=\frac{13}{3}\end{matrix}\right.\)
giải hệ phương trình :\(\left\{{}\begin{matrix}x+y=75\\\frac{90}{y}-\frac{90}{x}=1\end{matrix}\right.\)
giai hpt:
\(\int_{\frac{4x-y}{6}+\frac{x}{4}=1}^{\frac{x+y}{3}+\frac{2}{3}=3}\) . Chi minh cach bam may tinh giai hpt nay voi
Giải hpt: \(\left\{{}\begin{matrix}x+\frac{1}{y}=\frac{7}{2}\\y+\frac{1}{x}=\frac{7}{3}\end{matrix}\right.\)
Giải HPT \(\left\{{}\begin{matrix}\frac{1}{x-2}-\frac{1}{y-3}=2\\\frac{3}{x-2}-\frac{2}{y-3}=9\end{matrix}\right.\)
giải hpt
\(\left\{{}\begin{matrix}\frac{x}{y}-\frac{x}{y+12}=1\\\frac{x}{x-12}-\frac{x}{y}=2\end{matrix}\right.\)
giải HPT: \(\left\{{}\begin{matrix}x\sqrt{1-y^2}=\frac{1}{4}\\y\sqrt{1-x^2}=\frac{1}{4}\end{matrix}\right.\)
Giải hpt : a) \(\left\{{}\begin{matrix}xy^2+2x+y=4xy\\\frac{1}{xy}+\frac{1}{y^2}+\frac{y}{x}=3\end{matrix}\right.\)
b) \(\left\{{}\begin{matrix}x^2+y^2+\frac{4y}{x}=22\\\frac{3}{x^2+y^2-1}+\frac{2x}{y}=1\end{matrix}\right.\)