Multiple Choice Question (MCQ)
For i=\sqrt{1} ,what is the sum of (7+3i)+(−8+9i)?

✓
1+12i

×
16i

×
15+12i

×
156i
For i=\sqrt{1} ,what is the sum of (7+3i)+(−8+9i)?
1+12i
16i
15+12i
156i
To add or subtract two complex numbers, just add or subtract the corresponding real and imaginary parts.
Sum of the real parts of (7+3i) and (−8+9i)
7+(8) = 1
Sum of the imaginary parts of (7+3i) and (−8+9i)
3+9=12
The result is 1+12i
Correct choice is A