Chapter 1 - Equations and Inequalities - 1.3 Complex Numbers - 1.3 Exercises - Page 111: 12

complex number; real number

$0$ is known to be a real number. RECALL: The number $a+bi$ where $a$ and $b$ are real numbers is a complex number. Since $0= 0 + 0i$ and $0$ is a real number, then $0$ is a complex number. Thus, $0$ is: a real number; a complex number