The roots of
Question:

The roots of $a x^{2}+b x+c=0, a \neq 0$ are real and unequal, if $\left(b^{2}-4 a c\right)$

(a) > 0
(b) = 0
(c) < 0
(d) none of these

Solution:

(a) >  0

The roots of the equation are real and unequal when $\left(b^{2}-4 a c\right)>0$.

 

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