The complex conjugate of 13-21i is 1.3+ 2i.
In general the conjugate of a+bi is a - bi
and the conjugate of a-bi is a + bi
52 = 50
512= 500
500/50 = 10
Answer: 
<u>Step-by-step explanation:</u>

Answer: A. 35+1
B. 20+ 5z
C. 4 + 12
Step-by-step explanation:
This is just using the distributive property which is like foiling