Question

What is the value of $i^2$ in complex number?

Answer 1

$i$ is an imaginary number.

The value of $i^2$ in complex number is,

$i^2={\left(\sqrt{-1}\right)}^2$ $\left[\because i=\sqrt{-1}\right]$

$\Rightarrow$$i^2=-1$

Hence, the value of $i^2$ in complex number is $-1$.