## Algebra 2 (1st Edition)

$$-9x^{\frac{2}{3}}$$
Given that the two expressions, $f(x)$ and $g(x)$ are functions, we know that they will follow the rules of functions listed on page 429. Knowing this, we obtain: $$(-2-7)x^{\frac{2}{3}}=-9x^{\frac{2}{3}}$$