Question 597520
{{{
(9+14i)((6-5i)+(3-4i))=(9+14i)(6-5i+3-4i)=(9+14i)(9-9i)
}}}


Now we apply distribution


{{{
(9+14i)(9-9i)=9(9-9i)+14i(9-9i)=81-81i+126i+126=207+45i
}}}



:)