What is the expression in factored form?
9x2 - 12x + 4
A(3x - 2)2
B(-3x - 2)2
C(-3x + 2)(3x - 2)
D(3x + 2)2
9x2 - 12x + 4
A(3x - 2)2
B(-3x - 2)2
C(-3x + 2)(3x - 2)
D(3x + 2)2