Question

1/x-1/y=3/4xy=2это система

Answer 1

Уже решал 
$\frac{1}{x}-\frac{1}{y}=\frac{3}{4}\\ xy=2 \\\\ 4(y-x)=3xy\\ xy=2\\ \\ 4(y-x)=6\\ y-x=\frac{3}{2}\\ y=1.5+x\\ x(1.5+x)=2\\ x^2+1.5x-2=0\\ D=\sqrt{\frac{41}{4}}\\ x_{1}=\frac{-1.5-\frac{\sqrt{41}}{2}}{2}\\ x_{2}=\frac{-1.5+\frac{\sqrt{41}}{2}}{2}\\ y_{1}=-\frac{8}{\sqrt{41}-3}\\ y_{2}= \frac{8}{\sqrt{41}+3}$