Ответ:b2 = 1; b1 = 8/3
Пошаговое объяснение:
b не равно -1/3 и1/3
1) 4/((3b-1)*(3b+1)) - 4/(3b+1) - b/(-(3b-1)) = 0
2) 4/((3b-1)*(3b+1)) - 4/(3b+1) + b/(3b-1) = 0
3) (4-4(3b-1)+b*(3b+1))/((3b-1)*(3b+1)) = 0
4) (4-12b+4+3b^2+b)/((3b-1)*(3b+1)) = 0
5) (8-11b+3b^2)/((3b-1)*(3b+1)) = 0
6) 8-11b+3b^2 = 0
7) 3b^2 - 11b + 8 = 0
8) D = 25
9) b1;2 = (11+-5)/6
Ответ: b1=8/3; b2 = 1