## Introductory Algebra for College Students (7th Edition)

8x$^3$+10x$^2$-20x-4
$(-6x^3+7x^2-9x+3)+(14x^3+3x^2-11x-7)$ $(-6x^3+14x^3)+(7x^2+3x^2)+(-9x-11x)+(3-7)$ $(8x^3)+(10x^2)+(-20x)+(-4)$ $8x^3+10x^2-20x-4$