1.

What are the factors of \[{{x}^{4}}+2{{x}^{2}}+9\]?

A.  \[({{x}^{2}}+2x+3),({{x}^{2}}-2x+3)\]
B.  \[({{x}^{2}}+3),({{x}^{2}}-3)\]
C.  \[({{x}^{2}}+2x+3),({{x}^{2}}+2x+3)\]
D.  \[({{x}^{2}}+3),({{x}^{2}}+3)\]
Answer» B.  \[({{x}^{2}}+3),({{x}^{2}}-3)\]


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