Question

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

Answer 1

Answer

a³ - a² - 3a + 6

Explanation

The equation requires you to subtract the two expressions.

(a³ - 2a) - (a² + a - 6)

In such an expression we subtract the like term only.

(a³ - 2a) - (a² + a - 6) =  a³ - 2a - a² - a + 6

                                  = a³ - a² -2a - a + 6

                                  = a³ - a² - 3a + 6