C-05-Q020mediumsingle_mcq
If two roots of a quadratic are equal, then—
If two roots of a quadratic are equal, then—
- athe discriminant is positive
- bthe equation is an identity
- cthe equation has a repeated root
- dthe equation has no real root
ব্যাখ্যা
When the two roots of a quadratic coincide, the equation is said to have a repeated (double) root. This corresponds to a discriminant equal to zero, not positive.