Question

3a²b+(-4a²b)+9a²b
Add the following​

Answer 1

Step-by-step explanation:

as all terms are like we can add the coefficients.

3 + (-4) + 9 = 8

Answer = 8a^2

Answer 2

Answer:

$3 {a}^{2} b - 4 {a}^{2} b + 9 {a}^{2} b \\ 12 {a}^{2} b - 4 {a}^{2} b \\ 8 {a}^{2} b$