Find the sum of the squares of the solutions of $x^2-13x+4=0$.
Use quadratic Formula to find the roots
a = 1 b = -13 c = 4
\(x = {13 \pm \sqrt{13^2-4(1)(4)} \over 2(1)}\) to find x = 13/2 +- 3/2 sqrt 17 Then square the roots and add them together.... to get 81.