Recall that:
[tex]i^2=-1.[/tex]Applying the distributive property to the given expression we get:
[tex]3*1+3*(-i)-4i*1-4i*(-i).[/tex]Simplifying the above result we get:
[tex]\begin{gathered} 3-3i-4i+4i^2=3-3i-4i-4 \\ =-1-7i. \end{gathered}[/tex]Answer: Option A.
