Question

Short Answer. Add the following polynomials:

(-9x^2 + 7x + 9) + (-9x^3 + 8x^2 – 8)

Answer 1

combine like terms

Answer 2

\[-9x^3\] has no like term in the first polynomial
\[8x^2-9x^2=-x^2\]
\[9-8=1\] so you get
\[-9x^3-x^2+1\]

Answer 3

Thank you here's another one I need help on also