x*x=2

1.414213562373095 x 1.414213562373095 :P

Guten Morgen !

$x*x=x^2=2$

$x=\sqrt{2}=$   1.414213562373095            $x_{1}=+1,4142...$       $x_{2}=-1,4142...$

Gruß radix ! 

+/- sqrt(2)