Completely Factor the Polynomial or State That the Polynomial Is $$x ^ { 4 } + 4 x ^ { 2 } - 21$$

question 239

Multiple Choice

Completely factor the polynomial or state that the polynomial is prime.
- $$x ^ { 4 } + 4 x ^ { 2 } - 21$$

• A) \(\left( x ^ { 2 } + 3 \right) \left( x ^ { 2 } + 7 \right)\)
• B) \(\left( x ^ { 2 } - 3 \right) \left( x ^ { 2 } + 7 \right)\)
• C) prime
• D) \(\left( x ^ { 2 } + 3 \right) \left( x ^ { 2 } + 1 \right)\)

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