1. The problem asks to find the value of the expression $2n^2 - n + 4$ when $n = -3$. 2. The formula given is $2n^2 - n + 4$. We will substitute $n$ with $-3$ and simplify. 3. Substitute $n = -3$: $$2(-3)^2 - (-3) + 4$$ 4. Calculate the square: $$2(9) + 3 + 4$$ 5. Multiply: $$18 + 3 + 4$$ 6. Add all terms: $$18 + 3 = 21$$ $$21 + 4 = 25$$ 7. Therefore, the value of the expression when $n = -3$ is $25$. Final answer: D. 25