Answer:
10i
Step-by-step explanation:
multiply the parentheses
to get (2+i+2i+i^2) x (3+i)
i^2=-1
(2+i+2i-1) x (3+i)
collect like terms (1+3i) x (3+i)
multiply this out
3+i+9i+3i^2
3+10i+3(-1)
3+10i-3
