"et a, b, c, and d be the roots of x^4 + 8x^3 + 9x^2 + 5x + 4 = 0. Find the value of 1/ab + 1/ac + 1/ad + 1/bc + 1/bd + 1/cd.
Start by getting a common denominator then I will help more.
i think you're supposed to use vieta's formulas for it
Yes you do have to use Vieta's formulas.
First you have to get a common denominator.