Images 2 DX DY

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2 dx dy. Y dy/DX. X^3dy=y^3dx. D2y\dx2-dy\DX-2y=0 y=3. "(X^2-2xy)DX+(Y^2-2xy)dy".
Y dy/DX. X^3dy=y^3dx. D2y\dx2-dy\DX-2y=0 y=3. "(X^2-2xy)DX+(Y^2-2xy)dy".

See also