Ta có: \(\dfrac{x}{y}=\dfrac{3}{2}\)
\(\Leftrightarrow\dfrac{x}{3}=\dfrac{y}{2}\)
Đặt \(\dfrac{x}{3}=\dfrac{y}{2}=k\)
\(\Leftrightarrow\left\{{}\begin{matrix}x=3k\\y=2k\end{matrix}\right.\)
Ta có: \(H=\dfrac{2x-3y}{x-5y}\)
\(=\dfrac{2\cdot3k-3\cdot2k}{3k-5\cdot2k}=\dfrac{6k-6k}{3k-10k}=0\)
Ta có: ⇔x3=y2⇔x3=y2
Đặt H=2x−3yx−5yH=2x−3yx−5y
Ta có: ⇔x3=y2⇔x3=y2
Đặt H=2x−3yx−5yH=2x−3yx−5y