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a^3 + b^3 = c^3

Source: INMO 2009 Problem 6

January 18, 2009
quadraticsalgebrapolynomialInequality

Problem Statement

Let a,b,c a,b,c be positive real numbers such that a^3 \plus{} b^3 \equal{} c^3.Prove that: a^2 \plus{} b^2 \minus{} c^2 > 6(c \minus{} a)(c \minus{} b).