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Patrick Lee Scott · Answer 1 · 2023-12-31T23:27:13+0000

Answer:

$x=\pm 3i$

Explanation:

$x^2+9=0\\x^2=-9\\x=\pm 3i$

Because you cannot take the square root of a negative number to produce a real solution, then the result will be two conjugate complex numbers (hence the ± sign).

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