Well, there is no way to convert a decimal number to its radical equivalent. However, there is a way to simplify the radicals so that √76 is equal to 2√19.
You will need to use a program. To create a program, go to [Prgm] > New > 1: Create new… and enter a name. I will use RAD in this example. Here is the RAD source code (which I currently have in my calculator):
:To invite
:1→A
:2→me
:While I²≤abs(R
:While not(fPart(R/I²
:R/I²→R
:AI→A
:The end
:I+1+(I>2→I
:The end
:ClrHome
:1+integer(log(A
:If A≠1
:Output(1,1,A
:Answer−(A=1
:If R<0
:Then
:Exit(1.1+Years,”i
:Answer+1
:The end
:If 1≠abs(R
:Then
:Output(1.1+Years,”√(
:Output(1,3+Ans,R((R>0)−(R<0
:The end
When the program asks for R, give the number below the radical. In this case, 76. The program will then display its simplified form, 2√19. It can also handle negative numbers.