If $x+1$ is a factor of the polynomial $2 x^{2}+k x,$ then the value of $k$ is

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

$4+7 x+3 x^{2}$

Factorise :

$x^{2}+9 x+18$

Find the zero of the polynomial in each of the following cases

$q(m)=0.3 m-0.15$

Check whether $p(x)$ is a multiple of $g(x)$ or not :

$p(x)=x^{3}-5 x^{2}+4 x-3, \quad g(x)=x-2$

Check whether $g(x)$ is a factor of $p(x)$ or not, where

$p(x)=8 x^{3}-6 x^{2}-4 x+3, \quad g(x)=\frac{x}{3}-\frac{1}{4}$