Question

Factor the following binomial completely: 4x2 - 16
A. 2(x - 2)(x + 2)
B. 4(x - 2)(x - 2)
C. 4(x - 2)(x + 2)
D. (2x - 4)(2x + 4)

Answer 1

First, take out the 4. That will leave you with x2-4. After that, it is a difference of squares.

Answer 2

this is in the form a^2 - b^2

Answer 3

So, it has to be B or C, because a four is factored out. Because it is a difference of squares, there will be one positive term and one negative term (which is why there is no single x term).

Answer 4

The answer is C.