UPSKILL MATH PLUS

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If \(a, b, c\) are all non-zero and \(a + b + c = 0\), prove that \(\frac{a^2}{bc}+\frac{b^2}{ca}+\frac{c^2}{ab}=3\). 
 
Important!
This is a creative exercise. It will be checked manually by the teacher.