Answer:
240.
Step-by-step explanation:
Simply plug the given values into the equation, as follows, then run it through your calculator:
[tex]2(5)^{2} + (-10)[/tex]
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)