Theo đề bài:
\(xy=\dfrac{-1}{4}\)
Thay \(x=\dfrac{-1}{16}\)
=> \(\dfrac{-1}{16}.y=\dfrac{-1}{4}\)
=> y= 4
Ta có: xy = \(\dfrac{-1}{4}\)
Thay x =\(\dfrac{-1}{16}\) thì ta có:
=>\(\dfrac{-1}{16}\) y = \(\dfrac{-1}{4}\)
=>y = \(\dfrac{-1}{4}:\dfrac{-1}{16}\)
=>y =4