Special Roots and Signs of Roots

If the roots of $a{x}^2+bx+c=0$ are equal in magnitude but opposite in sign, then a possible condition is

The condition that one of the roots of the equation $a{x}^2+bx+c=0$ may be negative of the other is

The quadratic equation is ${\mathrm{ax}}^2+\mathrm{bx}+\mathrm{c}=0$. From below given options find the condition that shows both the roots as positive.

The condition that both the roots of the equation ${\mathrm{ax}}^2+\mathrm{bx}+\mathrm{c}=0$ are zero is:

If the roots of $x^2– px+q=0$ are two consecutive integers then the value of $p^2–4q$ is