Quadratic equations

ques. 2. Ans. 2

@yashingle
observe that first quad has both roots unreal as D < 0.
hence for second quadratic , since coeeficents are real you cant have one real root hence both roots common.

@ashishdeosingh how can we say that we cant have one real root in second quad just examining the coefficients. And how do we conclude that both roots of both equations are common??

@yashingle
in first quad D is less than zero so both roots unreal.
now second quad is suppose to have one root common, now one root if complex then other has to be complex conjugate. hence both common