Question

The square of $-9$ is

Answer 1

As we know, the square of a number is a number that is obtained by multiplying the integer by itself.

i.e Square of $-9$

$\begin{array}{rcl}{(-9)}^2& =& (-9)\times (-9)\\ & =& 81\end{array}$

Hence, The square of $-9$ is $81$.