What is the sum of all values of y for which the expression (y + 1)/(y^2 - 5y + 4 + y^2 - 6y) is undefined?
Hint:
because the demominator cannot equal 0. You must find the values of y such that
the denominator will equal 0. You can use vieta's formula to find the sum of roots immediately. You can take it from here.
