Respostas

2014-05-03T11:50:47-03:00
1A) a(a-1) / a = a - 1
B) (x+4)(x-4) / (x+4) = x- 4
C) (3x + 3)(x+1) / (x+1) = 3x + 3
D) (5a + 10 )(a-2) / (a-2) = 5a + 10
13 4 13