It is 2a-b simplified
4a+2b-1a+9b combine all alike variables using commutative property of addition 4a-1a+2b+9b Then add the like variables 3a+11b
Add them together: 3a+4a-a = 6a
Well if you are adding you would have 8a+2b subtract you would have -2a+2b
7a-2b
= 4a2 + 2ab 2b2
It is 2a-b simplified
4a+2b+a
3a - 2b
7
NoAnother Answer:-Yes sometimes it is possible as for example: 4a/8b can be simplified to 1a/2b
4a + 3c - 2b - c + a - b = 5a - 3b + 2c
4a+2b-1a+9b combine all alike variables using commutative property of addition 4a-1a+2b+9b Then add the like variables 3a+11b
a-b+a-b+2b+a = 4a
Add them together: 3a+4a-a = 6a
Assuming the missing sign is "minus" then you have the difference between two squares. This is solved as (x + y)(x - y). In your example x = 4a and y = 2b so the factorisation is (4a + 2b)(4a - 2b) or more completely: (4)(2a + b)(2a - b).
3a - 2b