Assuming you mean 2b^-6, with the 2b not in parenthesis, it simplifies to 2/b6, or 2 over b to the sixth.
It is: b+4 when simplified
a-2b is a binomial. It has two terms: a, and -2b.
12b - 9 + 2b - b = -87 13b - 9 = -87 13b = -87 +9 13b = -78 b = -6
(a + 2b)(a + 2b)
12c + 2b
2b+b-4
Well if you are adding you would have 8a+2b subtract you would have -2a+2b
4
= 4a2 + 2ab 2b2
It is 2a-b simplified
7 over 7 = 1 Then -2b divided by 1 = -2b
-7a-7b
2b
It is: b+4 when simplified
Change the order to make it more obvious: 3a - a + 2b + 4b 2a + 6b or 2 (a + 3b).
7(a-2b)-6(a-4b) 7a - 14b - 6a - 24b 7a - 6a - 14b - 24b a - 38b
3a - 2b