How would the expression x^2-7 be rewritten using difference of squares?

C.  (x - sqrt(7)) (x+sqrt(7))

Step-by-step explanation:

We need to use the difference of squares

x^2-a^2 = (x-a) (x+a)

Let x=x and a^2 = 7   so a= sqrt(7)

x^2 -7  can be rewritten as

(x - sqrt(7)) (x+sqrt(7))

the answer is 288..

hope this