Question

The quadratic equation px² + qx + r = 0 has imaginary roots, if ……………… 

A) q² > 4 pr 

B) q² < 4 pr 

C) q² = 4 pr 

D) p = q + r

Answer 1

Correct option is (B) q² < 4 pr

The quadratic equation \(px^2+qx+r=0\) has imaginary roots if \(q^2-4\,pr<0\)

\(\Rightarrow\) \(q^2<4\,pr\)

Answer 2

Correct option is B) q² < 4 pr