ODE problem: 3x^2 y dx + (x^3 + 2y)dy = 0

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The discussion centers on solving two ordinary differential equations (ODEs): 3x²y dx + (x³ + 2y) dy = 0 and (e^x sin(y) - 2y sin(x)) dx + (e^x cos(y) + 2 cos(x)) dy = 0. The first equation can be approached using the method of exact equations, while the second requires familiarity with specific techniques for solving non-exact ODEs. The participant attempted a substitution method for the first equation but did not achieve a solution, indicating a need for deeper understanding of ODE techniques.

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brad sue
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I have two ODE with which I cannot to slove;

3x2ydx+(x3+2y)dy=0

I tried to change of variable y=v*x, but I still cannot find a way to solve it.

the second is:

(exsin(y)-2ysin(x))dx+(excos(y)+2cos(x))dx=0

here I have no idea


thank you
B
 
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They are exact diff equ. Have you not seen how to solve such ode's?
 
Surely you know other techniques for solving ODE? This problem is tailor-made for one of them.
 

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