Question

Select the correct answer.

Factor the polynomial below.
4.12
16
ОА.
4(x - 2)2
O B.
4(x + 2)(x - 2)
O c.
4(2 - x)2
4(2 + x)2 - x)

Answer 1

4(x - 2)(x + 2) (Answer B)

Explanation:

4x^2 - 16 is the difference of two squares, a case in which there is a simple formula to remember: a^2 - b^2 = (a - b)(a + b)

4x^2 - 16 = (2x - 4)(2x + 4)

This can be further simplified: 2(x - 2)(2)(x + 2) = 4(x - 2)(x + 2) (Answer B)

Answer 2

B

Explanation:

That was actually trickier than I thought it would be

I was looking for 4(x-4), but 4(x-2)(x+2) also works