Question

the roots of the equation X square + K Y + 12 is equal to zero are real and equal then find k​

Answer 1

Answer:

if roots are equal and real therefore

D=0

x²+ky-12=0

D=b²-4ac

0=k²-4(1)(-12)

0=k²+48

k²=-48

k=√-48

k=±4√3