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Aratati ca: 1. a patrat- b patrat=(a-b)(a+b) 2. a la 3- b la 3=(a-b)(a patrat+ab+b patrat) Repede,va rogg!!!!!

Răspuns :

1. (a-b)(a+b)=a² + ab - ab - b² = a² - b²
2. (a-b)(a²+ab+b²)=a³ + a²b + b²a - a²b - b²a -b³ = a³ -b³