Question
Determine the value of k so that the two roots of the equation x2 − kx + 36 = 0 are equal.
Answer: Option A
:
A and B
Was this answer helpful ?
:
A and B
We know that roots of the quadratic equation is equal when D = 0
⇒b2−4ac=0
So, from the equation x2 − kx + 36 = 0
a = 1, b = -k and c = 36
⇒ k2−4(ac)=0
k2−4(36)=0
k2=144
∴ k = 12 or -12
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution