Question

Calculate the subtraction (8.5−1.8i)−(−1.3+2.7i)
. (1 point)
Responses

4.5−7.2i
4 point 5 minus 7 point 2 i

4.5−9.8i
4 point 5 minus 9 point 8 i

7.2−4.5i
7 point 2 minus 4 point 5 i

9.8−4.5i

Answer 1

(8.5 − 1.8i) − (−1.3 + 2.7i) = (8.5 + 1.3) + (−1.8 − 2.7)i = 9.8 − 4.5i

So the correct choice is 9.8 − 4.5i.