Question

Find the value of k for whic the quadratic equation 4x2 -12x-k=0 has no real roots

Answer 1

Here a=4

b=-12

c=k

according to formula

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

${ - 12}^{2} - 4.4.k$

144-16k

16k=144

k=144/16

k=9

hope it will help you