Réponse :
2n²-(n+1)n
2n²-n²+1n
1n²+1n
bonjour
2 n² - ( n + 1) n
= 2 n² - ( n² + n )
= 2 n² - n² - n
= n² - n
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Réponse :
2n²-(n+1)n
2n²-n²+1n
1n²+1n
bonjour
2 n² - ( n + 1) n
= 2 n² - ( n² + n )
= 2 n² - n² - n
= n² - n