a) \(X=\frac{2}{-7}\)và \(Y=\frac{-3}{11}\)
Ta có: \(\frac{2}{-7}>\frac{-3}{7}>\frac{-3}{11}\)
\(\Rightarrow\frac{-2}{7}>\frac{-3}{11}\Rightarrow x>y\)
b) + c) \(X=-0,75\)và\(Y=\frac{-3}{4}\)
Ta có: \(-0,75=\frac{-3}{4}=\frac{-3}{4}\)
\(\Rightarrow x=y\)