Add or subtract the complex numbers
-$(8+4 \mathrm{i})-(-9+\mathrm{i})$
A) $17+3 \mathrm{i}$
B) $-1+5 i$
C) $17-3 \mathrm{i}$
D) - $17-3 \mathrm{i}$

Question

Quizplus · Accepted Answer

To subtract the complex numbers, first distribute the minus sign across the second complex number, changing it to $+9-\mathrm{i}$. Then, add the real parts and the imaginary parts separately: $8 + 9 = 17$ and $4\mathrm{i} - \mathrm{i} = 3\mathrm{i}$, resulting in $17 + 3\mathrm{i}$.

Add or Subtract the Complex Numbers - (8+4i)−(−9+i)(8+4 \mathrm{i})-(-9+\mathrm{i})(8+4i)−(−9+i) A) 17+3i17+3 \mathrm{i}17+3i

Add or Subtract the Complex Numbers
- $(8+4 \mathrm{i})-(-9+\mathrm{i})$ A) $17+3 \mathrm{i}$