the probelm told me to take the 1st and 2nd derivatives of x^2-xy+y^2=9(adsbygoogle = window.adsbygoogle || []).push({});

for the 1st derivative i got dy/dx = y-2x/2y-x

but im stuck on taking the second derivative for impicit differenciation =(

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# Homework Help: Need help with 2nd derivatives

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