Question

For what value of k does the quadratic equation 4 x square - 12 x minus k is equal to zero have no real roots

Answer 1

4x²-12x=k

4x² - 12x -k=0

D=b²-4ac

=(-12)² - 4×4×-k

=144 +16k

-144=16k

k=-144/16

K=19..