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Mathematics, 16.01.2021 01:00 1630013

Which expression is equivalent to (x +9i)2? A. x2 + 18x + 81
B. x2 + 18xi – 81
C. x2 + 9xi +81
D. x2 + 9xi – 81

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Which expression is equivalent to (x +9i)2? A. x2 + 18x + 81
B. x2 + 18xi – 81
C. x2 +...

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