Question

Please Solve This Step By Step​

Answer 1

which standard of this question was?

Answer 2

Answer:

2ab^2 + 2b^2c + 3ac + b

Step-by-step explanation:

a(b^2 + 3c) - [b^2 (a-2c) - b (2ab + 1)]

= ab^2 +3ac -  [(ab^2 - 2b^2c) - (2ab^2 + b)]

= ab^2 + 3ac - ( - ab^2 - 2b^2c - b)

= 2ab^2 + 2b^2c + 3ac + b