Помогите решить уравнение
Y(x^2+1)dy/dx+x*(1+y^2)=0 y*dy/(1+y^2)= - x*dx/(x^2+1) d(1+y^2) / (1+y^2)= - d(x^2+1)/(x^2+1) ln(1+y^2) = - ln(x^2+1) + C (1+y^2) = C/(x^2+1) y^2 = C/(x^2+1) - 1