Answer:
11 -3i
First option is correct.
Step-by-step explanation:
We have to find the sum of the complex number 3 - 7i and 8 + 4i.
In adding two complex numbers, real part gets added with the real part and the imaginary part gets added with the imaginary part.
For the first complex numbers 3 - 7i, we have
real part = 3
imaginary part = -7i
For the second complex numbers 8 + 4i, we have
real part = 8
imaginary part = 4i.
Hence, the sum of the complex numbers is given by
3 - 7i + 8 + 4i
= (3+8) +(-7+4)i
= 11 -3i
First option is correct.
