Solve the equation 5x2 - 4x - 1 = 0
A
-1, 1/5
B
-1, -1/5
C
1, 1/5
D
1, -1/5
E
-1, 5
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
5x2 - 4x - 1 = 0
5x2 5x + x -1 = 0
5x(x - 1) + (x - 1) = 0
(5x + 1)(x -1) = 0
x = -1/5 or 1 = 0
Source: Myschool Past Questions Archive (Record #24004)