Question

If the equation 4x² + 2Kx +9=0 has non-real roots, then K lies in the interval
(A) (-0,-6) U (6,infinite)
(B) (-6,6)
(C) (-infinite, -6] + [6,infinite)
(D) (-6,6]​

Answer 1

If the equation 4x² + 2Kx +9=0 has non-real roots, then K lies in the interval (A) (-0,-6) U (6 ...