whats the sqaure root of 0?

This question is simply rhetorical ! The answer is 0 itself and you're just wasting precious time and space that is needed. I'm sorry to have offended you but it's only the facts. Don't ask such ridiculous questions if you already know the answer.

what's the sqaure root of 0?

This is NOT a ridiculous question.

The answer is 0 because 0*0=0