Question

I need help on 4b & 4d

Answer 1

4b is simplified. There are no like terms to combine.

`{b}^(2)`

is the only term with exponent of 2.

13b is the only term b, exponent of 1.

13 is the only number.

Explanation:

For 4d, it is hard to see but I think it is

`7a + 4 - 6 {a}^(2) - 2a`

Reorder terms from largest to smallest exponent.

`- 6 {a}^(2) + 7a - 2a + 4`

`- 6 {a}^(2) + (7 - 2)a + 4`

`- 6 {a}^(2) + 5a + 4`