What will be the value of k so that the quadratic equation kx2 – 4x + 1 = 0 has two equal roots?
- 2
- 3
-
4
- 8
- \(\frac{1}{4}\)
The correct answer is: C
Explanation
kx2 - 4x + 1 = 0, comparing with ax2 + bx + c = 0a = k, b = -4, c = 1 for equal root b2 = 4ac
(-4)2 = 4k
k = \(\frac{16}{4}\)
= 4