Factor as Completely as Possible $$x ^ { 4 } + 3 x ^ { 2 } - 4$$

question 111

Multiple Choice

Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.
- $$x ^ { 4 } + 3 x ^ { 2 } - 4$$

• A) \(( x + 1 ) ( x - 1 ) ( x + 2 ) ( x - 2 )\)
• B) \(( x - 1 ) ^ { 2 } \left( x ^ { 2 } + 4 \right)\)
• C) \(\left( x ^ { 2 } - 1 \right) \left( x ^ { 2 } + 4 \right)\)
• D) \(( x + 1 ) ( x - 1 ) \left( x ^ { 2 } + 4 \right)\)

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