All the values of $m$ for which both roots of the equation $x^2 - 2mx + m^2 - 1 = 0$ are greater than $-2$ but less than $4$ lie in the interval

If $x$ is real,then the minimum value of $y = \frac{x^2-x+1}{x^2+x+1}$ is

If one root of the equation $x^2 + px + 12 = 0$ is $4$,and the equation $x^2 + px + q = 0$ has equal roots,then what is the value of $q$?

Let $a, b \in \mathbb{R}, a \neq 0$ be such that the equation $a x^{2}-2 b x+5=0$ has a repeated root $\alpha,$ which is also a root of the equation $x^{2}-2 b x-10=0$. If $\beta$ is the other root of this equation,then $\alpha^{2}+\beta^{2}$ is equal to:

The product of the roots of the equation $9x^{2}-18|x|+5=0$ is

The value of $\sqrt{42+\sqrt{42+\sqrt{42+\ldots}}}$ is equal to: