22. When expanding the brackets (x - 2)(x + 2) will be:
A. x2 + 4 B. x2 + 4x - 4 C. x2 – 4
B. x2 + 4x - 4
To expand the brackets (x - 2)(x + 2), we will multiply each term in the first bracket by each term in the second bracket.
(x - 2)(x + 2)
= x * x + x * 2 - 2 * x - 2 * 2
= x^2 + 2x - 2x - 4
= x^2 - 4
So, the correct answer is C. x^2 - 4.