We can't use the Zero Product Property the way the equation is written, because it is not equal to zero. We could expand it and re-factor it, but there are easier methods.
The quadratic formula works for a quadratic in standard form [tex]ax^2+bx+c=0[/tex], so we would have to expand and simplify the equation.
That leaves us with the square root method. Notice that both [tex](x-1)^2[/tex] and 9 are perfect square. We take the square root of both sides and solve accordingly.
The answer is C.
