Question

6.

(x - 4)(x + 4) =
B) x + 16
C) X - 8x + 16
A)X? - 16
E) NOTA
D) x' + 8x + 16

Answer 1

x² - 16

Explanation:

Given

(x - 4)(x + 4)

Each term in the second factor is multiplied by each term in the first factor, that is

x(x + 4) - 4(x + 4) ← distribute both parenthesis

= x² + 4x - 4x - 16 ← collect like terms

= x² - 16