Add or Subtract as Indicated $\left( 3 x ^ { 7 } - 6 x ^ { 4 } \right) + \left( 6 x ^ { 7 } - 9 x ^ { 4 } - 2 \right)$

question 167

Multiple Choice

Add or subtract as indicated. Express the answer as a single polynomial in standard form.
- $\left( 3 x ^ { 7 } - 6 x ^ { 4 } \right) + \left( 6 x ^ { 7 } - 9 x ^ { 4 } - 2 \right)$

• A) \(3 x ^ { 7 } - 6 x ^ { 4 } - 2 x\)
• B) \(9 x ^ { 7 } - 15 x ^ { 4 } - 2\)
• C) \(- 2 x - 15 x ^ { 7 } - 5 x ^ { 4 }\)
• D) \(- 11 \mathrm { x } ^ { 12 }\)

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