I can not get the correct anser

Hi, Please help me.  As the following sch I can not get the correct sqrt value.  if changing resistor of R1 I always get 12v direct flow output.
Attachments:
op_divider.zip ‏121 KB

Thanks for your answers.  I want the sch to do the operation of square root.
 1. in my sch the inverting input is DC -5v, I want to get the square root of 5?
 2. In my feedback path I use a multiplier, I Originally thought it is a negative feedback?
 3. it Already have ground in the sch, I do not understand that you say "did not ground the scope"?
Thanks again, Could you give me the further pointing. if possible Could you give me a correct sch.
(in fact, I get the sch from a rough sch in a textbook(the rough sch not for multisim). I just give the values for the all components)

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