<span>{x^2+y^2=16 => y^2=16-x^2 => y=</span>√(16-x^2)<span>
{x-y=4 => y=x-4
{f(x)=</span>√(16-x^2)
{f(x)=x-4
Решение: (4'0)
Вложение
3y-9/x²-xy+x-y / xy-3x+2y-6/x²-y²= 3(y-3)/x*(x-y)+x-y * x²-y²/xy-3x+2y-6=3(y-3)/(x+1)(x-y) * (x-y)*(x+y)/x*(y-3)+2(y-3)=3(y-3)/x+1 * x+y/(x+2)(y-3)=3/x+1 * x+y/x+2=3(x+y)/(x+1)(x+2)=3x+3y/x²+2x+x+2=3x+3y/x²+3x+2
Решение смотри в приложении