Question

Let f(x) = x + 9 and g(x) = x – 3. What is f(x) • g(x)?
x2 + 6x – 27
x2 – 9x + 27
x2 + 9x – 12
x2 – 6x + 27

Answer 1

\(f(x) * g(x) = (x+9)(x-3)\). Now expand the expression.

Answer 2

expand?

Answer 3

do multiplication

Answer 4

x2 + 9x – 12 ?

Answer 5

Nope, try again.

Answer 6

use FOIL method,i.e;