Question

the equation 2x2 + kx + 3 =0 has two equal roots , then the value of k is​

Answer 1

Answer:

since roots are equal

then ,

d=0

$b {}^{2} - 4ac = 0 \\ k {}^{2} - 4 \times 2 \times 3 = 0 \\ k {}^{2} - 24 = 0 \\ k {}^{2} = 24 \\ k = \sqrt{24} \\ k = 2 \sqrt{6}$