Question 264509
Since division by zero is not allowed, we must make sure that the denominator {{{2x}}} is not equal to zero. If it is, then {{{2x=0}}} means that {{{x=0}}}. So if {{{x=0}}}, then the denominator is zero (which is not allowed). So when {{{x=0}}}, the rational expression {{{-3/(2x)}}} is not defined.