For what value of k the quadratic equation: 7( x2 + x ) + k = 0 has equal
roots.
Answers
Answered by
3
Step-by-step explanation:
ANSWER
kx
2
−5x+k=0
Here a=k,b=−5,c=k
Given that the equation has equa roots.
Therefore,
D=0
b
2
−4ac=0
(−5)−4(k)(k)=0
25−4k
2
=0
⇒4k
2
=25
⇒k=±
4
25
=±
2
5
Hence the value of k is ±
2
5
.
Similar questions