1/y -1/x=5
x²+y²=27
x.y=?
x²+y²=27
x.y=?
1/y -1/x=5 =>x+y=5xy
(x-y)2=(5xy)2
x²-2xy+y²=25x²y²
27-2xy=25x²y²
x.y=a diyelim
25a²+2a-27=0
a=-27/25 veya a=1
(x-y)2=(5xy)2
x²-2xy+y²=25x²y²
27-2xy=25x²y²
x.y=a diyelim
25a²+2a-27=0
a=-27/25 veya a=1