Some tip you can share to solve this equation?

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SUMMARY

The discussion focuses on solving the equation x^2(yy''-{y'}^2)+xyy'-y\sqrt{y^2+x^2y'^2}=0. A suggested approach involves substituting z=xy', which initially appears ineffective. However, a more effective method is proposed: dividing the equation by y^2 and using the substitution z=y'/y, which simplifies the problem to a first-order equation in z. This technique is crucial for effectively tackling the original equation.

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Mathematicians, students studying differential equations, and anyone interested in advanced calculus techniques will benefit from this discussion.

GodsmacK
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Hi everyone,
I've been trying to solve the following equation:

x^2(yy''-{y'}^2)+xyy'-y\sqrt{y^2+x^2y'^2}=0

One of the tries was to do the substitution z=xy'. However, it doesn't seem to work...
 
Last edited:
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Try starting by dividing the equation by y2, and working with z =y'/y. This will reduce it to a first order equation in z.

Chet
 

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