The differential equation is dxdy=x+xy.
To find the integrating factor, the equation must be written in standard form:
dxdy+P(x)⋅y=Q(x)
dxdy=x+xy
dxdy=x(1+y)
dxdy−xy=x
The equation is now in standard form with P(x)=−x and Q(x)=x.
The integrating factor is given by:
I.F.=e∫P(x)dx
I.F.=e∫(−x)dx
∫(−x)dx=−2x2
Therefore, the integrating factor is:
I.F.=e−x2/2