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.
a) x-4+9
b) x-2
For part b, I am not 100% sure about my answer, but I am sure about part a.
the answer is 9:25 ............
t=11/6
u=1/9
