If $f(x)=\frac{x+4}{x^2+ax+b}$, and f(x) has two vertical asymptotes at x=1 and x=-2, find the sum of a and b.
asymptope at 1 and -2
(x+4) / [(x+2)(x-1)]
(x+4)/(x^2 +x-2) tak it from here ....
So,,,,, What
