To evaluate the function $g(x) = x^2 - 5x + 2$ when $x = -1$, substitute $x = -1$ into the equation:

$g(-1) = (-1)^2 - 5(-1) + 2$

Simplifying:

$g(-1) = 1 + 5 + 2 = 8$

So, $g(-1) = 8$.

Would you like more details on how this was calculated?

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Here are 5 related questions to expand your understanding:

1. How would you evaluate $g(x)$ when $x = 2$?
2. Can you find the vertex of the quadratic function $g(x) = x^2 - 5x + 2$?
3. What is the value of $g(x)$ when $x = 0$?
4. How do you determine the axis of symmetry for the quadratic function $g(x)$?
5. Can you find the roots of $g(x) = 0$?

Tip: Always check your sign when substituting negative values into an equation!