Question

so sánh 2 số x=2/-5 và y= -3/13

Answer 1

\(x=\dfrac{2}{-5}=\dfrac{-2\times13}{5\times13}=\dfrac{-26}{65}\)

\(y=\dfrac{-3}{13}=\dfrac{-3\times5}{13\times5}=-\dfrac{15}{65}\)

Do \(\dfrac{26}{65}>\dfrac{15}{65}\) nên \(-\dfrac{26}{65}< -\dfrac{15}{65}\)

Vậy \(x< y\)

Answer 2

\(\dfrac{2}{-5}=\dfrac{-2}{5}=\dfrac{-26}{65}\)

\(\dfrac{-3}{13}=\dfrac{-15}{65}\)

mà -26<-15

nên x<y