Write the coefficients of $x^{2}$ in each of the following polynomials
$4+7 x+3 x^{2}$
$11$
$6$
$3$
$1$
Factorise
$27 x^{3}-y^{3}+64 z^{3}+36 x y z$
Using suitable identity, evaluate the following:
$101 \times 102$
Factorise :
$x^{3}+x^{2}-4 x-4$
The following expressions are polynomials? Justify your answer:
$\frac{1}{x+1}$
If $p(x)=x+3,$ then $p(x)+p(-x)$ is equal to
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