Write the coefficients of $x^{2}$ in each of the following polynomials

$\sqrt{5} x^{2}-7 x+13$

Write the coefficient of $x^{2}$ in the following polynomials

$5-7 x-3 x^{2}$

Evaluate the following using suitable identities

$(995)^{3}$

Find the zeroes of the polynomial in each of the following:

$h(y)=2 y$

Find the zeroes of the polynomial in each of the following:

$q(x)=2 x-7$

Factorise :

$x^{3}-6 x^{2}+11 x-6$