Question

How do you combine like terms in `(5b ^ { 2} + 4) + ( 2b - 5) + ( 4b ^ { 2} - 4b )`?

Answer 1

`9b^2-2b-1`

Explanation:

open all brackets
`5b^2+4+2b-5+4b^2-4b = 5b^2+4b^2+2b-4b+4-5=9b^2-2b-1`