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a^3 + 3ab^2 - 3a^2 b - b^3 > 0
a^3 - 3a^2 b + 3ab^2 - b^3 > 0
(a - b)^3 > 0^3 (^3 habis)
a - b > 0
a > b (d)
^ = pangkat
maaf kalau salah
semoga membantu