Question

Calculate the subtraction (8.5−1.8i)−(−1.3+2.7i)
. Provide the answer in the form of a+bi
.(1 point)

Answer 1

To perform the subtraction \((8.5−1.8i)−(−1.3+2.7i)\), we can rewrite it as:

\[
(8.5 - 1.8i) + (1.3 - 2.7i)
\]

Now, we can combine the real and imaginary parts separately:

1. **Real Parts**: \(8.5 + 1.3 = 9.8\)
2. **Imaginary Parts**: \(-1.8 - 2.7 = -4.5\)

So, putting it all together, we get:

\[
9.8 - 4.5i
\]

Thus, the final answer in the form \(a + bi\) is:

\[
\boxed{9.8 - 4.5i}
\]