" 21.Solve "(x^(2)+y^(2))dx=(2xy)dy

Solve (x^(2)-y^(2))(dy)/(dx)=2xy

Solve: (x^(2)+y^(2))(dy)/(dx)=xy

Solve : (x^(2)-y^(2)) dx + 2xy dy = 0

Solve (1+x^(2))(dy)/(dx)=xy

Solve :- (x^2+y^2)dx-2xy dy=0

Show that each of the following differential equations is homogeneous and solve each of them : (x^(2)+y^(2))dx=2xy dy .