Respostas

2013-08-14T15:13:12-03:00
(ab-b+1)(ab+a-1) para a=4 e b= -2

[4.(-2) - (-2) + 1] . [4.(-2) + 4 - 1]
[-8 + 2 +1 ] . [-8 +4 +1]
[-5] . [-3] = 15
1 5 1
2013-08-14T16:52:46-03:00
(ab-b+1)(ab+a-1) para a=4 e b= -2

[4.(-2) - (-2) + 1] . [4.(-2) + 4 - 1]
[-8 + 2 +1 ] . [-8 +4 +1]
[-5] . [-3] = 15

1 5 1