There are steps to find a sum and product of roots of the quadratic equations:
1- find the sum and products of the roots 
2-get the value of a, b, and c 
3-subtitute the value of -b/a(the sum of the roots)   into thier coefficients 
4-substitute the value c/a (the produch of the roots) into their coefficients 
5-find the roots of the equation