Question 123666
Question:

Add or subtract as indicated 
b+b-1
2b+b^2-1
a-1+a+1
a+1+a-1
4-a-5 
1-5-a

Answer:

b+b-1 = 2b -1

{{{2b+b^2-1}}} = Here the answer is same, it cannot do further because all are unlike terms...

a-1+a+1 = 2a

a+1+a-1 = 2a

4-a-5   = -a-1

1-5-a   = -4-a


Hope you found it useful.



Regards.


Praseena.