Answer:
a³ - 5a² + 6a - 8
Step-by-step explanation:
Given we require
g(a) × h(a)
= (a - 4)(a² + 2 - a)
Each term in the second factor is multiplied by each term in the first factor, that is
a(a² + 2 - a) - 4(a² + 2 - a) ← distribute both parenthesis
= a³ + 2a - a² - 4a² - 8 + 4a ← collect like terms
= a³ - 5a² + 6a - 8 ← in standard form
