The equation \( x^2 = -9 \) would have no real solutions because the square of a real number cannot be negative. However, there are complex solutions.
In the complex number system, this equation can be rewritten as:
\[ x^2 = -9 \implies x = \pm \sqrt{-9} = \pm 3i \]
Thus, there are 2 complex solutions.
So the equation would have 2 solution(s).