Let , then the values of for which doesn't have two real and distinct roots is
(-1,4]
[-1,4)
(-1,4)
[-1,4]
doesn't have real and distinct roots, so either it will have real and equal roots or imaginary roots .
Quadratic Expression Graph when a > 0 & D = 0 -
Real and Equal roots of
&
- wherein
Option 1)
(-1,4]
This is incorrect
Option 2)
[-1,4)
This is incorrect
Option 3)
(-1,4)
This is incorrect
Option 4)
[-1,4]
This is correct
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