Step-by-step explanation:
4 the greatest common factor is four
The answer to this question is B!
I believe the answer is c im am stuck on the same problem do you know the answer?<span />
1. Use Difference of squares: a^2-b^2=(a+b)(a-b)
(x+k)(x-k)=0
2. Solve for x and k
x=+-k
k=+-x