# Chapter 5 - Inner Product Spaces - 5.1 Length and Dot Product in Rn - 5.1 Exercises - Page 235: 19

Distance=$=2\sqrt 2$ units.

#### Work Step by Step

Distance =Distance $=\sqrt {1−(−1))^{2}+(−1−1)^{2}}$ $=\sqrt {2^{2}+2^{2}}$ $=\sqrt 8$ $=2\sqrt 2$ units.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.