Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If the quadratic equations 
and 
have a common root, then for non-zero real value of 
the sign of the expression 
is
A
negative for all 
B
positive for all 
C
negative for all 
D
positive for all 
Text Solution
Verified by ExpertsThe correct answer is:
D
Now from given quadratic eqn. we have
Now from eq (i)
…….(iii)
and from eqn (ii)
…………(iv)
or 4 (from eqn (iii) and (iv)
If (not possible)
we consider 
expression is: 
Expression is + ve
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