Talk:List of United States elementary school mathematics competitions

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For positive numbers a,b,c such that a^2+b^2+c^2=9. Find the maximum value of :

P=2(a+b-c)+abc

Me_Algebra

       For positive numbers a,b,c such that a^2+b^2+c^2=9. Find the maximum value of :
                                       P=2(a+b-c)+abc