## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$x^5+8x^4+6x^3-2x-9$
Add the polynomials then combine like terms to obtain: $=8x^4-x^3+x-4+x^5+7x^3-3x-5 \\=x^5+8x^4+(-x^3+7x^3)+(x-3x)+(-4-5) \\=x^5+8x^4+6x^3+(-2x)+(-9) \\=x^5+8x^4+6x^3-2x-9$