Question 90221
{{{(4x-5)(x+1)=0}}} Set denominator equal to zero

{{{4x-5=0}}} or {{{x+1=0}}} Set each factor equal to zero


{{{x=5/4}}} or {{{x=-1}}} Solve for x



So {{{x=5/4}}} and {{{x=-1}}} must be excluded since they make the denominator equal to zero