For this case we must simplify the following expression:
[tex]4a ^ 2 + 7b ^ 2 + 5b ^ 2-2a[/tex]
We add similar terms taking into account that:
Equal signs are added and the same sign is placed.
[tex]4a ^ 2 + (7b ^ 2 + 5b ^ 2) -2a =\\4a ^ 2 + 12b ^ 2-2a[/tex]
Thus, the correct option is option B.
Answer:
Option B
