Question

The roots of $a{x}^2+bx+c=0,a\ne 0$ are real and unequal, if $(b^2-4ac)$
(a) > 0
(b) = 0
(c) < 0
(d) none of these

Answer 1

(a) > 0
$\begin{array}{l}\text{The roots of the equation are real and unequal when}(b^2-4ac)>0.\\ \end{array}$