If $x+1$ is a factor of the polynomial $2 x^{2}+k x,$ then the value of $k$ is
Factorise $: 4 x^{2}+4 x y-3 y^{2}$
State whether each of the following statements is true or false
In polynomial $5 x^{3}-3 x^{2}+11 x-14,$ the coefficient of $x^{3}$ is $3.$
Factorise
$\frac{x^{2}}{4}+\frac{3 x y}{5}+\frac{9 y^{2}}{25}$
If $x+1$ is a factor of $a x^{3}+x^{2}-2 x+4 a-9,$ find the value of $a$.