Question
For the equation which of the following statements is incorrect?
(a) If (b2 − 4ac) < 0, the roots are imaginary.
(b) If (b2 − 4ac) = 0, the roots are real and equal.
(c) If (b2 − 4ac) > 0 and (b2 − 4ac) is a perfect square, then the roots are rational and unequal.
(d) (b2 − 4ac) < 0, the roots are irrational.