To evaluate \( g(-3) \) for the function \( g(x) = 5x^2 - 2x \), we substitute \( x = -3 \) into the function:
\[ g(-3) = 5(-3)^2 - 2(-3) \]
Calculating \( (-3)^2 \):
\[ (-3)^2 = 9 \]
Now substituting back in:
\[ g(-3) = 5(9) - 2(-3) \]
Calculating \( 5(9) \):
\[ 5(9) = 45 \]
And calculating \( -2(-3) \):
\[ -2(-3) = 6 \]
Now we combine these results:
\[ g(-3) = 45 + 6 = 51 \]
Thus, the value of \( g(-3) \) is \( 51 \).
The correct answer is \( \boxed{51} \).