Question #N492
If $x^2 - 6x + 9 = 0$, what is the value of $x$?
A. 1
B. 2
C. 3
D. 6
Correct Answer is: C
The equation is a perfect square trinomial, which can be factored as $(x - 3)^2 = 0$. Taking the square root of both sides gives $x - 3 = 0$, which means $x = 3$.