Question

Find the value of k, if the roots if the quadratic equation
x + 6x + k = 0 are real and equal.​

Answer 1

Answer:

K value will be -2 or -10

Step-by-step explanation:

by using quadratic formula

-b+/-root of bsq -4ac divided 2a

subistute the value that it's

Answer 2

Answer:

x²+6x+k= 0 are given quadratic equation

Compair this equation with,ax²+bx+c=0

therefore,we get a=1,b=6 and c=k

b²-4ac=6²-4×1×k

=36-4k

but:b²-4ac=0 .....(roots are real and equal)

Therefore,0=36-4k

4k=36

k=9 ....(d.b.s.by 4)