Answer:
Some of the prime factors are 1,2,4,5,10,20,-1,-.2,-4,-5,-10,-20, and since 5 is prime you can just start with 5 and 4
Step-by-step explanation:
C.
I'm not sure what you're asking
8 + 7i
Change the sign of the imaginary part.
The conjugate of 8 - 7i is 8 + 7i.
