Find the solutions to $z^4 = -4.$  Enter the solutions, separated by commas.
Question:
Find the solutions to $z^4 = -4.$  Enter the solutions, separated by commas.
Answer:
Let's think step by step.

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1 + i, 1 - i, -1 + i, -1 - i
Find the solutions to $z^4 = -4.$  Enter the solutions, separated by commas.
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