Question

Let f(x) = x + 7 and g(x) = x − 4. Find f(x) ⋅ g(x).

x2 − 3x − 28
x2 − 3x − 11
x2 + 3x − 28
x2 + 3x − 11

Answer 1

you should multiply
(x+7)(x-4)

Some people use FOIL. See
https://www.khanacademy.org/math/in-eighth-grade-math/algebraic-expressions-identities/polynomial-by-polynomial/v/multiplying-binomials

Answer 2

so is b