Perform the Indicated Operation and Write Your Answer with Positive $$\frac { \mathrm { mn } ^ { - 1 } - \mathrm { nm } - 1 } { \mathrm {~m} ^ { 2 } - \mathrm { n } ^ { 2 } }$$

question 193

Multiple Choice

Perform the indicated operation and write your answer with positive integer exponents.
- $$\frac { \mathrm { mn } ^ { - 1 } - \mathrm { nm } - 1 } { \mathrm {~m} ^ { 2 } - \mathrm { n } ^ { 2 } }$$

• A) \(\frac { 1 } { m n }\)
• B) \(\frac { 1 } { m + n }\)
• C) \(m + n\)
• D) \(\mathrm { mn }\)

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