Question

the value of k for which the quadratic equation
$2x {}^{2} + kx + 2 = 0$
has equal roots is​

Answer 1

Answer:

since D=b² -4ac

so

here a= 2 b=k c= 2

now

k²-4×2×2=0

= k²-16=0

= k²=16

= k=4