Question 893413
X-intercepts are when f(x)=0.
For this function, it equals zero when the numerator equals zero.
{{{x^2-x-20=(x-5)(x+4)}}}
Two solutions:
{{{x-5=0}}}
{{{x=5}}}
and
{{{x+4=0}}}
{{{x=-4}}}
(5,0) and (-4,0)
.
.
.
{{{graph(300,300,-10,10,-5,5,(x^2-x-20)/(x^2+5))}}}