By how much does a a^3-2a exceed a^2 + a - 6

a³ - a² - 3a + 6

Step-by-step explanation:

we are asked by how much does (a³-2a) exceed (a²+a-6)

in other words, we are being asked to find the difference between the 2 terms above.

Mathematically we are asked to find:

(a³-2a) - (a²+a-6) (expand parentheses by distribution property)

= (a³-2a - a² - a + 6)

= a³ - a² - 3a + 6 (answer)