Răspunsuri

2014-10-19T21:15:36+03:00

a^6 - b^6 = (a³ - b³)(a³ +b³) = (a-b)(a²+ab+b²)(a+b)(a²-ab+b²)

7a(2-7a) + (10b-1)(10b+1)

2 1 2