The standard form of the quadratic equation is given by: ax ^ 2 + bx + c What we must do in this case is to rewrite the given equation. We have then: 2/3 (x-4) (x + 5) = 1 (x-4) (x + 5) = 3/2 (x ^ 2 + 5x-4x-20) = 3/2 2x ^ 2 + 2x-40 = 3 2x ^ 2 + 2x-43 = 0 Thus, the values of a, b and c are: a = 2 b = 2 c = -43 Answer: a = 2 b = 2 c = -43
