1. The problem asks to find the result of the expression $2 - 5$. 2. The operation involved is subtraction, where we subtract 5 from 2. 3. Subtraction rule: When subtracting a larger number from a smaller number, the result is negative. 4. Calculate the subtraction: $$2 - 5 = -3$$ 5. Therefore, the final answer is $-3$.