Find the discriminant of the quadratic 5x^2 - 2x + 8 - 2x^2 + 6x + 2 - 2x^2 + 4x - 1.
Simplify as
1x^2 + 8x + 9
Discriminant
8^2 - 4 (1) (9) =
64 - 36 =
28
+479 
