Question

What is the distance between (–6,3,4) and (4,–1,2)?

Answer 1

$\sqrt{(4 + 6) {}^{2} + ( - 1 - 3) {}^{2} + (2 - 4) {}^{2} }$

$\sqrt{100 + 16 + 4}$

$= \sqrt{120}$

$2\sqrt{30}$