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Which of the following expressions is equal to -x^2-81? A) (-x-9i)(x-9i) B) (-x+9i)(x-9i) C) (x+9i)(x-9i) D) (-x-9i)(x+9i)

Which of the following expressions is equal to -x^2-81?

A) (-x-9i)(x-9i)

B) (-x+9i)(x-9i)

C) (x+9i)(x-9i)

D) (-x-9i)(x+9i)

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