gaokao 2018 Q1

gaokao · China · national-II-arts 5 marks Complex Numbers Arithmetic Complex Division/Multiplication Simplification

$i ( 2 + 3 i ) =$
A. $3 - 2 \mathrm { i }$
B. $3 + 2 i$
C. $- 3 - 2 \mathrm { i }$
D. $- 3 + 2 \mathrm { i }$

$i ( 2 + 3 i ) =$\\
A. $3 - 2 \mathrm { i }$\\
B. $3 + 2 i$\\
C. $- 3 - 2 \mathrm { i }$\\
D. $- 3 + 2 \mathrm { i }$