Help > Authoring > Equations > Inserting Math Elements in an Equation > Building a Simple Radical
  
Building a Simple Radical
1. Open the Equation Editor window.
2. To create This is a picture of the square root of three.This is a picture of the square root of three., choose Constructs > root. Note that the marker now surrounds the input box representing the radicand.
3. From the keyboard, type: 3
4. Press F5 twice to return to the main equation level.