![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Cau hoi tuong tu nhe ban tick cho mk dc khog co tick thi mk thanks nhieu
![](https://rs.olm.vn/images/avt/0.png?1311)
Có 2x^2 - 5xy + 2y^2
= 2x^2 - 4xy - xy + 2y^2
= ( 2x^2 - 4xy + 2y^2 ) - xy
= 2( x + y )^2 - xy
![](https://rs.olm.vn/images/avt/0.png?1311)
\(xy-2x+2y=7\)
\(\Rightarrow x\left(y-2\right)+2\left(y-2\right)=3\)
\(\Rightarrow\left(x-2\right)\left(y-2\right)=3\)
Xét ước:v
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{5}{x}-\frac{4}{3}=\frac{1}{6}\)
\(\Leftrightarrow\frac{5}{x}=\frac{1}{6}+\frac{4}{3}\)
\(\Leftrightarrow\frac{5}{x}=\frac{1}{6}+\frac{4\cdot2}{6}\)
\(\Leftrightarrow\frac{5}{x}=\frac{1}{6}+\frac{8}{6}\)
\(\Leftrightarrow\frac{5}{x}=\frac{9}{6}\)
\(\Leftrightarrow\frac{5}{x}=\frac{3}{2}\)
\(\Rightarrow x\cdot3=2\cdot5\)
\(\Rightarrow x=\frac{2\cdot5}{3}=\frac{10}{3}\)
Mà \(x\inℤ\)nên x không thỏa mãn
P/S : y đâu?
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)