(x/(x-1)-1) * xy-y/x = (x/(x-1) - (x-1)/(x-1) * xy - y/x = (x - x + 1)/(x-1) * xy - y/x = 1/(x-1) * xy - y/x = xy/(x-1) - y(x) = xy*x/(x-1) - y*(x-1)/x = (x^2y - xy + y) / (x-1)
x²(x-1)²+x(x²-1)=2(x+1)²
x²(x²-2x+1)+x(x²-1)=2(x²+2x+1)
x⁴-2x³+x²+x³-x=2x²+4x+2
x⁴-x³-x²-5x-2=0
x⁴+x³-2x³-x²-2x²+2x²-x-4x-2=0
x²(x²-2x-1)+x(x²-2x-1)+2(x²-2x-1)=0
(x²+x+2)(x²-2x-1)=0
x²+x+2=0
D<0, нет корней
x²-2x-1=0
D= 4+4=8
x1= (2+√8)/2= (2+2√2)/2= 1+√2
x2= (2-2√2)/2= 1-√2
1000м2 (если просто ответ)