Factorise
$16 x^{2}-40 x y+25 y^{2}$
Find the zeroes of the polynomial:
$p(x)=(x-2)^{2}-(x+2)^{2}$
Classify the following as a constant, linear,quadratic and cubic polynomials:
$3 x^{3}$
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. $(x>0)$
Write the following cubes in expanded form
$(2 a-5 b)^{3}$