gaokao 2023 Q2

gaokao · China · national-A-science 5 marks Complex Numbers Arithmetic Systems of Equations via Real and Imaginary Part Matching

If the complex number $( a + i )( 1 - ai ) = 2$ , then $a =$
A. $-1$
B. $0$
C. $1$
D. $2$

If the complex number $( a + i )( 1 - ai ) = 2$ , then $a =$

A. $-1$

B. $0$

C. $1$

D. $2$