Suppose $$ f(x)=x^{2}-9 x-2 $$. Compute the following: A.) $$ f(-1)+f(1)=\square $$ B.) $$ f(-1)-f(1)=\square $$ Question Help: Video

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Let's compute the values step by step for the function $$ f(x) = x^{2} - 9x - 2 $$.

### Part A: $$ f(-1) + f(1) $$

1. **Compute $$ f(-1) $$:**
   $$
   f(-1) = (-1)^2 - 9(-1) - 2 = 1 + 9 - 2 = 8
   $$

2. **Compute $$ f(1) $$:**
   $$
   f(1) = (1)^2 - 9(1) - 2 = 1 - 9 - 2 = -10
   $$

3. **Sum the results:**
   $$
   f(-1) + f(1) = 8 + (-10) = -2
   $$

### Part B: $$ f(-1) - f(1) $$

1. **Using the previously computed values:**
   $$
   f(-1) = 8 \quad \text{and} \quad f(1) = -10
   $$

2. **Subtract the results:**
   $$
   f(-1) - f(1) = 8 - (-10) = 8 + 10 = 18
   $$

### Final Answers:
- **A.)** $$ f(-1) + f(1) = \boxed{-2} $$
- **B.)** $$ f(-1) - f(1) = \boxed{18} $$
A.) $$ f(-1) + f(1) = -2 $$ B.) $$ f(-1) - f(1) = 18 $$

Suppose \( f(x)=x^{2}-9 x-2 \). Compute the following: A.) \( f(-1)+f(1)=\square \) B.) \( f(-1)-f(1)=\square \) Question Help: Video

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