The quadratic equation .............. has a root $x=3$.

Solve the following equation using the method of factorization and write its solution set: $\frac{1}{x-2}+\frac{1}{x+3}=\frac{7}{2x}$ $(x \neq 2, x \neq -3, x \neq 0)$

The value of discriminant $D$ for the equation $(3x - 14)^2 = 0$ is ........

The roots of a quadratic equation $6 x^{2}-13 x+6=0$ are .... .

Find the roots of the quadratic equation using the quadratic formula:
$2x^{2} - 3x - 5 = 0$

Which of the following polynomials does not have any real zero?