Final answer:
After subtracting the real parts (4 and 6) and imaginary parts (-5i and -3i) of the complex numbers, the expression simplifies to -2 - 2i, which is answer choice (a).
Step-by-step explanation:
To perform the indicated operation and simplify the expression (4-5i)-(6-3i) to the form a+bi, we will subtract the real parts and the imaginary parts separately.
- Subtract the real parts: 4 - 6 = -2
- Subtract the imaginary parts: -5i - (-3i) = -5i + 3i = -2i
Combining the results gives us -2 - 2i. Therefore, the simplified form of the expression is -2 - 2i, which corresponds to answer choice (a).