Add √31 + √31
√31 + √31 = 2√31.
To add √31 + √31, we can simplify the square roots first.
Since both square roots are the same, we can add them directly.
So, √31 + √31 = 2√31.
Therefore, the sum of √31 + √31 is 2√31.
To add two square roots, we need to check if they have the same radicand (the number inside the square root symbol). In this case, both square roots have the radicand of 31.
So, we can add them together:
√31 + √31 = 2√31
The answer is 2√31.