Evaluate Using the Given Value -m^2n+m^2 when m=-4

$- m^{2} n + m^{2}$ when $m = - 4$

Replace the variable $m$ with $- 4$ in the expression.

$- {(- 4)}^{2} n + {(- 4)}^{2}$

Simplify each term.

Raise $- 4$ to the power of $2$ .

$- 1 \cdot 16 n + {(- 4)}^{2}$

Multiply $- 1$ by $16$ .

$- 16 n + {(- 4)}^{2}$

Raise $- 4$ to the power of $2$ .

$- 16 n + 16$