Factor Completely $12 x ^ { - 6 } + 7 x ^ { - 5 } + x ^ { - 4 }$

question 145

Multiple Choice

Factor completely.
- $12 x ^ { - 6 } + 7 x ^ { - 5 } + x ^ { - 4 }$

• A) \(\frac { ( x + 4 ) ( x + 3 ) } { x ^ { 6 } }\)
• B) \(\frac { ( x + 4 ) ( x + 3 ) } { x ^ { 4 } }\)
• C) \(\frac { ( x - 4 ) ( x - 3 ) } { x ^ { 6 } }\)
• D) \(\frac { ( x - 4 ) ( x - 3 ) } { x ^ { 4 } }\)

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