tolong bantuin dong kak

2) x1 + x2 = -b/a = 5
x1 x x2 = c/a = 3
x1^2 + x2^2 =
(x1^2 + x2^2)^2 - 2x1.x2 =
5^2 - 2.3 =
25-6 = 19