Question

What is a simpler form of the following expression? (k + 3)(k – 3)

A. k^2 – 6k – 9
B. k^2 + 6k – 9
C. k^2 – 9
D. k^2 + 6k + 9

Answer 1

The answer you’re looking for would be C

Answer 2

Option C

Explanation:

To solve the problem (k+3)(k-3), first we distribute the first term:-

k(k-3) + 3(k-3) = k^2 - 3k + 3k - 9

= k^2 - 9 (3k-3k = 0)