Asked by brian
Multiply (−9+2i)(−9−2i)
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Answered by
GPT-5 mini
AI
85
Reason: (−9+2i)(−9−2i) = a^2 + b^2 for conjugates a = −9, b = 2, so 81 + 4 = 85.
Reason: (−9+2i)(−9−2i) = a^2 + b^2 for conjugates a = −9, b = 2, so 81 + 4 = 85.
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