Add or Subtract as Indicated $$\left( x ^ { 2 } + 1 \right) - \left( 8 x ^ { 2 } - 4 \right) + \left( x ^ { 2 } + x + 4 \right)$$

question 29

Multiple Choice

Add or subtract as indicated. Express the answer as a single polynomial in standard form.
- $$\left( x ^ { 2 } + 1 \right) - \left( 8 x ^ { 2 } - 4 \right) + \left( x ^ { 2 } + x + 4 \right)$$

• A) \(- 6 x ^ { 2 } + x + 9\)
• B) \(- 7 x ^ { 2 } + x + 9\)
• C) \(- 6 x ^ { 2 } - 3 x + 5\)
• D) \(- 8 x ^ { 2 } + x + 9\)