Answer:
240.
Explanation:
Simply plug the given values into the equation, as follows, then run it through your calculator:
![2(5)^(2) + (-10)](https://img.qammunity.org/2021/formulas/mathematics/high-school/112ubtzzpcs1f5k4xir8qwe1txwd267rz3.png)
Since the values B and C don't exist in this context, we can ignore them.
Running that equation through our calculator, we get 240.
(If you don't have a calculator, it's important to remember PEMDAS while you're solving this equation)