. If the equation 9y2 + 6ky + 4 = 0 has equal roots, then the value of k
Answers
Answered by
7
Equal and real roots are there,
When d= 0
D= b^2-4ac=0
= 36k^2-4(9)(4)=0
= 36k^2- 144 = 0
= 36k^2 = 144
k ^2 = 144/36
k^2 =4
K = +2,-2
Therefore, the values of k are +2,-2.
When d= 0
D= b^2-4ac=0
= 36k^2-4(9)(4)=0
= 36k^2- 144 = 0
= 36k^2 = 144
k ^2 = 144/36
k^2 =4
K = +2,-2
Therefore, the values of k are +2,-2.
Similar questions