January 2021 0 79 Report
Bonjour sil vous plais c'est la 2 eme foi que je demande on considère:
A=(a-1)au carré +a au carré +(a+1)au carré

1) développer et réduire l'expression A.
2) déterminer trois nombres entiers consécutif,a-1; a et a+1,dont la somme des carrés est 1 325. Expliquer la démarche.
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