Factorise
$27 x^{3}-y^{3}+64 z^{3}+36 x y z$
$(3 x-y+4 z)\left(9 x^{2}+y^{2}+16 z^{2}+3 x y\right.$$+4 y z-12 z x)$
Find the value of $m$ so that $2 x-1$ be a factor of $8 x^{4}+4 x^{3}-16 x^{2}+10 x+m.$
The degree of polynomial $5 x^{2}-7 x-11$ is……….
Evaluate
$(421)^{2}$
Using suitable identity, evaluate the following:
$101 \times 102$
The following expressions are polynomials? Justify your answer:
$\sqrt{3} x^{2}-2 x$
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