Question

How do you combine `(b^3 + 2b^2 + 3b) + ( 4b^3 - 5b^2 + 4b)`?

Answer 1

Regroup based on factors of `b` with the same exponent values:
(b^3+2b^2+3b)+(4b^3-5b^2+4b)#

`=(b^3+4b^3)+(2b^2-5b^2)+(3b+4b)`

`=5b^3-3b^2+7b`