Question

find the value of k so that 3x²+kx+3=0 has equal roots​

Answer 1

Step-by-step explanation:

If the roots are equal the discriminant should be equal to 0

$( {k}^{2} ) - 4(3)(3) = 0$

${k}^{2} = 36$

Taking square root on both sides

$k = + 6 \: \: or \: \: - 6$

Answer 2

use the formula D= b^2-4ac

then the equal roots are 6,-6