Which of the following equations has its roots as 4 and -5?
A
x2 + 4x - 20 = 0
B
x2 + x + 20 = 0
C
x2 - x + 20 = 0
D
x2 + x - 20 = 0
E
x2 - x - 20 = 0
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
(x - 4)(x + 5) = 0
x\(^2\) + 5x - 4x - 20 = 0
x\(^2\) + x - 20 = 0
Source: Myschool Past Questions Archive (Record #23860)