1 answer
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To solve the equation \(x^2 + 4 = 0\), we can rearrange it:
\[
x^2 = -4
\]
To find \(x\), we take the square root of both sides. The square root of a negative number involves imaginary numbers:
\[
x = \pm \sqrt{-4} = \pm \sqrt{4}i = \pm 2i
\]
Thus, the solutions for \(x\) are \(2i\) and \(-2i\), which are imaginary numbers.
Therefore, the correct response is:
**imaginary**