Evaluate the Function f(-1)=2x^2-x-1

$f (- 1) = 2 x^{2} - x - 1$

Step 1

Replace the variable $x$ with $- 1$ in the expression.

$f (- 1) = 2 {(- 1)}^{2} - (- 1) - 1$

Step 2

Simplify the result.

Simplify each term.

Raise $- 1$ to the power of $2$ .

$f (- 1) = 2 \cdot 1 - (- 1) - 1$

Multiply $2$ by $1$ .

$f (- 1) = 2 - (- 1) - 1$

Multiply $- 1$ by $- 1$ .

$f (- 1) = 2 + 1 - 1$

Simplify by adding and subtracting.

Add $2$ and $1$ .

$f (- 1) = 3 - 1$

Subtract $1$ from $3$ .

$f (- 1) = 2$

The final answer is $2$ .

$2$

Step 3