I'm having trouble grasping the concept of this exponent problem. I got the right answer, but just don't get it. The "detailed" explanation doesn't seem to help either. I have put in RED the correct answer, as well as as the explanation given (as I said, I'm not following how they explained it). Here is the question:
If X^64=64, then x^32=?
A) 8 or -8
B) 12 or -12
C) 16
D) 32 or -32
E) 48
Explanation:
X^64=(X^32)^2
X^64=64
(X^32)^2=64
Since the only two numbers whose square is 64 are 8 and -8, X^32=8 or X^32=-8
If X^64=64, then x^32=?
A) 8 or -8
B) 12 or -12
C) 16
D) 32 or -32
E) 48
Explanation:
X^64=(X^32)^2
X^64=64
(X^32)^2=64
Since the only two numbers whose square is 64 are 8 and -8, X^32=8 or X^32=-8
