3.
If the roots of the quadratic equation x² + 6x + k = 0 are equal, then the value
of 'k' is :
B. -9
A. 9
C. 8.
D. 5
Answers
Answered by
6
x² + 6x + k = 0
compare equation with ax²+bx+c=0
a=1,b=6,c=k
the roots of quadratic equation is real and equal.
b²-4ac=0
6²-4×1×k=0
36-4k=0
-4k=-36
4k=36
k=36/4
k=9
Answered by
3
Answer:
The answer is 9
Good day mate
Attachments:
Similar questions