Find $| \mathbf { a } |$ , a + B $\mathbf { a } - \mathbf { b }$

Essay

Find $| \mathbf { a } |$ , a + b, $\mathbf { a } - \mathbf { b }$ , 2a, and 3a + 4b given $\mathrm { a } = \langle - 1,2 \rangle$ and $b = \langle 4,3 \rangle$ .