Evaluate the Function C(-1)=-4x^2+4x+3

$C (- 1) = - 4 x^{2} + 4 x + 3$

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

$C (- 1) = - 4 {(- 1)}^{2} + 4 (- 1) + 3$

Simplify the result.

Simplify each term.

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

$C (- 1) = - 4 \cdot 1 + 4 (- 1) + 3$

Multiply $- 4$ by $1$ .

$C (- 1) = - 4 + 4 (- 1) + 3$

Multiply $4$ by $- 1$ .

$C (- 1) = - 4 - 4 + 3$

Simplify by adding and subtracting.

Subtract $4$ from $- 4$ .

$C (- 1) = - 8 + 3$

Add $- 8$ and $3$ .

$C (- 1) = - 5$

The final answer is $- 5$ .

$- 5$