Question 612420
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Hi, 
Find all numbers in which the rational expression is not defined for;
{{{(2x-7)/(x^2+5x-4)}}}
the rational expression is not defined when Denominator = 0
x^2+5x-4 = 0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-5 +- sqrt( 41))/(2) }}}   ||Not defined for these x-values