Question

Find the value of k if kx²+kx+2=0 where values should be real with unequal roots?

Answer 1

Answer

For quadratic equations


For equal and real roots DISCRIMINATE


DISCRIMINATE= 0

D=O

so

${b}^{2} - 4ac = 0$

$b = k$

$a = k$

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


${k}^{2} - 8k = 0$


${k}^{2} = 8k$


$k = 8$