How to write mathematical symbol in Android xml button as root n of x, x high n, would have to do so typed and not with picture.
You can use unicode codes to do this: Declare the code in your string.xml <string name="raiz"> √ </string> And in your xml screen: <Button ... android:text="@string/raiz" ... /> Here are two lists that you find the codes to use: List 1 List 2
Thanks for the tip !
– Vale