Bonjour
x³ - 2xy + x²y - yx² - 2y² + xy²
= x³ - 2xy -2y² + xy²
Bonne journée
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Bonjour
x³ - 2xy + x²y - yx² - 2y² + xy²
= x³ - 2xy -2y² + xy²
Bonne journée