# Question #b3986

Sep 20, 2017

Distance between $\hat{i} + \hat{j}$ and $- \hat{i} + 2 \hat{j}$ is $\left(1 - \left(- 1\right)\right) \hat{i} + \left(1 - 2\right) \hat{j}$ is equal to $2 \hat{i} - \hat{j}$
$\left\{\left(3 \hat{i} + 2 \hat{j}\right) . \left(2 \hat{i} - \hat{j}\right)\right\} = 6 - 2 = 4 j$