a^3 + b^3 = c^3
Source: INMO 2009 Problem 6
January 18, 2009
quadraticsalgebrapolynomialInequality
Problem Statement
Let 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).