Classify the following as linear, quadratic or cubic polynomial

$35 x^{2}-16 x-12$

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

$q(x)=2 x-7$

Factorise

$4 x^{2}+9 y^{2}+49 z^{2}-12 x y+42 y z-28 z x$

Factors of $x^{2}-23 x+120$ are.........

Expand the following:

$(3 a-2 b)^{3}$

Give possible expressions for the length and breadth of a rectangle whose area is given as $\left(20 x^{2}+22 x+6\right)$ square units. $(x>0)$