Answer:
5-46i
Step-by-step explanation:
first multiply your (10-4i)(4-5i) so that would be 20-66i when simplified. then add that to -15+20i so it would look like 20-66i+(-15+20i). then simplify and you should get 5-46i.
1/3
B
11x - 6x + 20
combine like terms:
5x + 20
3
5*3 is 15.
