Question

1. Multiply each pair of polynomial functions below to find an expression for f(x) · g(x).

Justify your work to show how you know your answer is correct.
a. f(x) = 2x and g(x)
= (x + 3)
b. f(x) = (x + 3) and g(x) = (x - 5)
c. f(x)
(2x + 1) and g(x) = = (x − 3)
d. f(x) = (x + 3) and g(x)
=
= (x + 3)

Answer 1

Explanation:

a : 2x(X+3)

2x^2+6x

B: (X+3)(X-5)

X^2-5x+3x-15

X^2-2x-15

C: (2x+1)(X-3)

2x^2-6x+x-3

2x^2-5x-3

D: (X+3)(X+3)

X^2+3x+3x+9

X^2+6x+9