Respostas

2013-09-10T14:35:16-03:00
3a(2a - b) - [a(6a - 3b) - b(3a - 5b)]
6a² - 3ab - (6a² - 3ab - 3ab + 5b²)
6a² - 3ab - 6a² + 3ab + 3ab - 5b²
(6a² - 6a²) + (3ab - 3ab + 3ab) - 5b²
0 + 3ab - 5b
3ab - 5b
OU
b(3a - 5)
2 4 2