solve diffeential equation.
( x2y +xy -y )dx + (x2 y -2 x2) dy =0 answer x + ln x + x-1 + y- 2 lny = c
dy / dx + 2y = e-2x - x^2 y (0) =3 answer y = 3 e -2s + e-2x ( intefral of e -s^2ds ) s is power ^ 2 means s to power of 2
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