Question

if the roots of the quadratic equation x^2+6x+k=0 are equal, then the value of 'k' is​

Answer 1

Answer:

k=9

Step-by-step explanation:

If the roots are equal, then b²-4ac=0

6²-4.1.k=0

36-4k=0

4k=36

k=9

Answer 2

Answer:

k=9

Step-by-step explanation:

$x {}^{2} + 6x + k = 0$

have equal roots

therefore b^2 - 4ac = 0

there fore

$6 {}^{2} - 4 \times 1 \times k = 0$

$- 4k = - 36$

therefore k=9