Answer:
Option D.
Step-by-step explanation:
The given expression is
[tex]4a-7b+2ab-a+b[/tex]
We need to find the simplified form of the given expression.
In this expression 4a and -a are like terms, and -7b and b are like terms.
Combined like terms in the given expression to find the simplified form of the given expression.
[tex](4a-a)+(-7b+b)+2ab[/tex]
[tex](3a)+(-6b)+2ab[/tex]
[tex]3a-6b+2ab[/tex]
Therefore, the correct option is D.
