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Find the Sum or Difference $( n - 1 ) ( n + 1 )$

Question 99

Multiple Choice

Find the sum or difference.
- $( n - 1 ) ( n + 1 )$

A) $n ^ { 2 } - 2 n + 1$
B) $n ^ { 2 } - 1$
C) $n ^ { 2 } - 2 n - 1$
D) $n ^ { 2 } - 2$

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