Question

Simplify.

(x-3)(
`x^(2)`-4x-7)

A.
`x^(3)`-3
`x^(2)`+12x+21

B.
`x^(3)`-7
`x^(2)`+19x+21

C.
`x^(3)`-7
`x^(2)`+5x+21

D.
`x^(3)`+
`x^(2)`-5x-21

Answer 1

The answer is C. Use FOIL rules as you would for a binomial, then combine like terms.

Using FOIL rules, we get:

x^3-4x^2-7x-3x^2+12x+21.

Combine like terms to get x^3-7x^2+5x+21 (C)

:)