$\sqrt{\left(-2-3\right)^2\ +\ \left(-1-1\right)^2}$

$\sqrt{\left(1-3\right)^2\ +\ \left(-1-2\right)^2}$

$\sqrt{\left(-2-3\right)^2\ -\ \left(-1-1\right)^2}$

$\sqrt{\left(-2-3\right)^2\ -\ \left(-1-1\right)^2}$

$d\ =\ \sqrt{\left(4-2\right)^2\ -\ \left(0-2\right)^2}$

$d\ =\ \sqrt{\left(4-0\right)^2\ -\ \left(-2-2\right)^2}$

$d\ =\ \sqrt{\left(-2\ +0\right)^2\ +\ \left(4+2\right)^2}$

$d\ =\ \sqrt{\left(-2-2\right)^2\ +\ \left(4-0\right)^2}$

$d\ =\ \sqrt{\left(5-3\right)^2\ +\ \left(0--2\right)^2}$

$d\ =\ \sqrt{\left(2-5\right)^2\ +\ \left(3\ -0\right)^2}$

$d\ =\ \sqrt{\left(5-3\right)^2\ -\ \left(0--2\right)^2}$

$d\ =\ \sqrt{\left(4-3\right)^2\ -\ \left(2-4\right)^2}$