What are the restrictions, if any, on values for the variables in the following radical expressions?

1) √5-x

2) 7-√n+8

3)6y-5+2

When you have a sqrt()

Make sure the value inside of it is nonnegative.

So

sqrt(3) works since 3 is not negative

sqrt(2.5) works since 2.5 is nonnegative.

sqrt(0) works since 0 is nonnegative.

sqrt(-3) does not work since -3 is negative.

=^._.^=