## Elementary Linear Algebra 7th Edition

Distance=Distance $=\sqrt {(1-(-1))^{2}+(-1-3)^{2}+(2-0)^{2}}$ $=\sqrt {2^{2}+(-4)^{2}2^{2}}$ $=\sqrt {24}$ units.
Distance $=\sqrt {(1-(-1))^{2}+(-1-3)^{2}+(2-0)^{2}}$ $=\sqrt {2^{2}+(-4)^{2}2^{2}}$ $=\sqrt {24}$ units.