Which of the following equations has its roots as 4 and -5?
- A.
x^{2} + 4x – 20 = 0 - B.
x^{2} + x + 20 = 0 - C.
x^{2} – x + 20 = 0 - D.
x^{2} + x – 20 = 0 - E.
x^{2} – x – 20 = 0
Correct Answer: Option D
Explanation
(x – 4)(x + 5) = 0
x(^2) + 5x – 4x – 20 = 0
x(^2) + x – 20 = 0