The given expression is
[tex]\begin{gathered} rs\text{ + 14s } \\ \text{If we substitute r = 6 and s = }\frac{1}{4}\text{ into the express}\imaginaryI on,\text{ it becomes} \\ 6\text{ }\times\frac{1}{4}\text{ + 14 }\times\frac{1}{4} \\ \frac{3}{2}+\text{ }\frac{7}{2} \\ By\text{ adding both numbers, it becomes} \\ \frac{10}{2}\text{ = 5} \end{gathered}[/tex]The solution is 5
