Factor Completely $x ^ { 4 } - 1$ A) $\left( x ^ { 2 } - 1 \right) ( x + 1 ) ( x - 1 )$

question 21

Multiple Choice

Factor completely.
- $x ^ { 4 } - 1$

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

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