Chapter 9.5, Problem 2AYU

If $\text{w}\text{=}{a}_2\text{i}\text{+}{\text{b}}_{\text{2}}\text{j}$ and $\text{v}=a_1\text{i}\text{+}{\text{b}}_{\text{1}}\text{j}$ are two vectors, then the _______ __________is defined as $\text{v}\cdot \text{w}\text{=}{a}_1{a}_2\text{+}{\text{b}}_{\text{1}}{a}_2$.