8. Add

 

(x^2+7x-8)+(2x^2-4x+5)

Remove parentheses and combine like terms.

 

3x^3+3x-3

 

There is another popular format for these addition of

polynomila problems. Since we are going to combine like terms, it

would be helpful if we lined up the like terms in a vertical format.

 

The problem lined up in a vertical format