Question

What is the value of k for which the quadratic equation 3x^2 - kx +k =0 has equal roots???​

Answer 1

for having two equal roots, D=0

D= b square-4ac

b square- 4ac=0

a=3, b=-k, c=k

b square -4ac=0

k square-12k=0

k(k-12)=0

k-12=0

k=12