Question

i will medal and fan!
Simplify the given expression below:

(1 + 2i) • (5 − 3i)

2 − 15i
3 + 2i
5 − 6i
11 + 7i

Answer 1

i got D

Answer 2

Correct

Answer 3

\[(1 + 2i)(5- 3i)\]

Answer 4

\[5 -3i + 10i -6i^2 \]

Answer 5

Like terms

\[5 + 7i - 6i^2\]

Answer 6

Convert -6i^2 -> +6

\[11 + 7i\]

Answer 7

Remember:

\[i^2 = -1\]

Answer 8

\[-6(-1) = +6\]