+118654 un square - that is a new way of explaining it - but I know exactly what you mean 
The opposite of squaring a number is to take the square root of it. So
$$7^2=49 \qquad \sqrt{49}=7$$
So if you want the square root of 121 and you cannot do it in your head than you can use the calc on the home page.
Press the $$\sqrt x$$ button and the write 121 =
that should give you the answer that you want. 
+118654 un square - that is a new way of explaining it - but I know exactly what you mean
The opposite of squaring a number is to take the square root of it. So
$$7^2=49 \qquad \sqrt{49}=7$$
So if you want the square root of 121 and you cannot do it in your head than you can use the calc on the home page.
Press the $$\sqrt x$$ button and the write 121 =
that should give you the answer that you want.
