Factor x^2 + 81 in the complex numbers

label Algebra
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A; (x - 9)(x - 9)

B:

C; (x + 9i)(x + 9i)

D: (x + 9i)(x - 9i)  

Apr 7th, 2015

option D

(x + 9i)(x - 9i) ........................................................

Apr 7th, 2015

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Apr 7th, 2015
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Apr 7th, 2015
Oct 24th, 2017
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