If (x - 1)^2 = 324, which of the following could be the value of x - 4?  Choose the correct choice from the following answers
A) 16  B) 14  C) -19  D) -21  E) -23
(x - 1)^2 = 324   (x - 1) = 18 or -18   x = 19 or -17   x - 4 = 15 or -21   The answer is -21.
<result>D</result>
If (x - 1)^2 = 324, which of the following could be the value of x - 4?