If all else fails, you can simply highlight the symbol below, copy it, and paste it wherever you need it: Summary Table for Quick Reference Device/Software Shortcut / Method Windows Alt + 251 (on number pad) Mac Option + V MS Word Alt + = then type \sqrt Chromebook Ctrl+Shift+U, then 221a, Enter iPhone/Android Found in the symbols sub-menu AI responses may include mistakes. Learn more
The fastest way to type the symbol on Windows is using "Alt Codes." This method requires a keyboard with a dedicated numeric keypad (the numbers on the far right side of the keyboard).
If shortcuts fail, the most universal method is to copy the symbol from a search engine (e.g., Google "square root symbol") and paste it.