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What is the product of (x-9i)^2?
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What is the product of (x-9i)^2?

User KTCO
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(x - 9i)^2 = (x - 9i)(x - 9i) = x^2 - 9xi - 9xi - 81 = x^2 - 18ix - 81
User Egor Lakomkin
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