Question

Find the following product: $(-18)\times (-5)\times (-4)$

Answer 1

Compute the product:

The product of odd number of negative integers is a negative integer. Therefore,

$(-18)\times (-5)\times (-4)=90\times \left(-4\right)\left[\because (-)\times (-)=+\right]$

$=-360\left[\because (-)\times (+)=-\right]$

Hence, the product of $(-18)\times (-5)\times (-4)$ is $-360$.