Short Answer. Add the following polynomials.
(4x^2-3x+2)+(5x^3-7x^2-9)
We can only add "like" terms
I see one x^3 term, two x^2 terms, one x term, and two constants
(4x^2-3x+2)+(5x^3-7x^2-9)
I see one x^3 term, two x^2 terms, one x term, and two constants