\sqrt{6-2\sqrt5}-\sqrt{9-4\sqrt5}=1
źródło:
L=\sqrt{1-2\sqrt5+5}-\sqrt{4-4\sqrt5+5}=
=\sqrt{(1-\sqrt5)^2}-\sqrt{(2-\sqrt5)^2}=|1-\sqrt5|-|2-\sqrt5|=
=-(1-\sqrt5)+(2-\sqrt5)=-1+\sqrt5+2-\sqrt5=1
P=1
L=P