Question 459234
{{{ (x-17) / ((x-20)*(x+9)) < 0 }}}
I can use logic to find answer
Clearly, if {{{ x<17}}}, you have minus factors
on top and bottom and left side is >0
If {{{x=17}}}, left side = 0
If {{{ 17<x<20}}}, you have a (+) on top
and a (-) on the bottom, and left side <0
If {{{x=20}}} the bottom = 0, which is infinity
If {{{x >20}}}, top and bottom are (+)/(+)
and left side >0
The solution, then is {{{ 17<x<20 }}}