What will be the value of k so that the quadratic equation kx2 - 4x + 1 = 0 has two equal roots?
A
2
B
3
C
4
D
8
E
\(\frac{1}{4}\)
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
kx2 - 4x + 1 = 0, comparing with ax2 + bx + c = 0
a = k, b = -4, c = 1 for equal root b2 = 4ac
(-4)2 = 4k
k = \(\frac{16}{4}\)
= 4
Source: Myschool Past Questions Archive (Record #32629)