Which of the following is equal to (n - 3)^2 if n = 11?

Question

A. (n + 6) (n - 6)
B. (n + 5) (n - 7)
C. (n + 4) (n - 8)
D. (n + 3) (n - 9)
E. (n + 2) (n - 10)

Answer 1

if n=11, then (n-3)^2 = 64

A) is 17(5) ≠64
B) is 16(4) = 64 ahhhh!!!
I assume there is only one answer, but check the others anyway.

Answer 2

Yup, you're right Reiny, it is B.

Answer 3

Do I first FOIL (n - 3)^2, then put = 64?

Answer 4

no need to do FOIL, just sub in n=11
(n-3)^2
= (11-3)^2
= 8^2
= 64

now just put n=11 into the different choices for answers

Answer 5

Oh okay. I see. Thank you Reiny