how do you square a root of 7
Well you can use the calculator, but it is continued so you probably will have to round on your answer.
That's a good answer. Also if you meant how do you square the square root of seven, then you can use this. Any square root times itself is the number inside the radical
Derpy thinks that you mean \(\sqrt7\)
And LagTho thinks that you mean \((\sqrt7)^2\)
You could mean other things as well.
You have not worded your question properly.