Square root of -121 and simplify it and show me steps

The answer would be 11i, first you would figure out what the square root of 121 is, which is 11.  To simplify, you would write the square root sign and underneath that it would say 11x-1. The negative one is an imaginary number because there really ain't negative square roots of anything.  I wish I couldve showed you but I don't have a camera.  I hope I expllained it to where you can understand Sorry.

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .