How do you solve 4x plus 8y raised to the second?

Answer 1

The first thing you have to do is make sure you understand the question,

and know what it's looking for as a solution. You're not there yet.

Equations have solutions, but this is not an equation. It's an expression that

stands for a number. There's no way to figure out what the number is until

somebody tells you what numbers 'x' and 'y' are.

There's no question in your question, and nothing that needs to be solved.