Question 21815
Denominators can NEVER equal zero.  Therefore, the following values are NOT allowed, because they would make the denominators equal to zero.


{{{3/x }}}
x cannot equal zero!


{{{4/(x-6) }}} 
x cannot equal 6, because that value of x makes the denominator zero.  NOT allowed!


{{{(x+5)/(x^2-36)}}}
Factor the denominator:
 {{{(x+5)/((x-6)(x+6))}}}
x cannot equal either +6 or =6!


{{{ (x2-3x+2)/(x^2+x-30)}}}

Factor the numerator and denominator:
{{{ ((x-2)(x-1))/((x+6)(x-5))}}}
x cannot equal -6 or +5, since these values make denominators zero.  


R^2 at SCC