Quadratic Equat...

If the roots of the equation $$ax^2+bx+c=0$$ are all real equal then which one of the following is true?

If the roots of a quadratic equation are equal, than discriminate is

Which is a quadratic equation?

The number of integral values of $$'x'$$ for which $$x^{2}+19x+92$$ is a perfect square is: 

The solution of the equation $$x+\cfrac{1}{x}=2$$ will be

If $$81$$ is discriminant of $$2{ x }^{ 2 }+5x-k=0$$ then the value of $$k$$ is

Which of the following is non-quadratic polynomial.

Which of the following must be added to $$x^2-6x+5$$ to make it a perfect square ?

The discriminant of the quadratic equation $$ ax^2+bx+c= 0$$ is

Which of the following is a quadratic equation?