Question

find the value of k for which the quadratic equation 4x^_kx+1 =0 has two equal roots

Answer 1

Answer:

for equal roots, Discriminant = 0

${k}^{2} - 4 \times 4 \times 1 = 0$

${k}^{2} = 16$

$k = 4 \: or \: - 4$