Hello, not sure if it's a typo in the book but I can't work this out:(adsbygoogle = window.adsbygoogle || []).push({});

y'' + y(x^2 + e^x) = 0;

It's second order but both dependent and independent variables are present, and i am stuck.

You don't have to solve it for me entirely, a hint would be great.

Thanks in advance.

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# Second order DE

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