Completely factor the polynomial or state that the polynomial is prime.x4 - 18x2 + 81

A. (x - 9)2
B. (x - 9)(x + 9)
C. (x2 + 9)2
D. (x2 - 9)2


Answer: D

Mathematics

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A.  

B.  

C.  

D.  

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Mathematics