Sorry guys ... just when I think I have the hang of these I have a few that jump out at me and make me start questioning what the heck I am doing.

My first problem is to mulitply and simplify assuming all variables in a radicand represent positive real numbers. I made the checks because I am not able to create the great square root symbols you can make.

√6x^3 * √4x^2

Second Problem is to add or subtract as indicated:I am not sure how to get this one to type correctly so I will say it looks like an exponent above and before the square root symbol. so I will type it above

3 3

√27x^4 + √xy^6

Third one I would think how many I have done of these I would have gotten this one correct. No laughing please!!

it says to express each number in terms of i and simplify if possible.

√-63