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

$p(x)=x-4$

Find the quotient and the remainder when $x^{3}+x^{2}-10 x+8$ is divided by

$x+3$

Expand

$(x+2 t)(x-5 t)$

The degree of polynomial $7 x^{5}-4 x^{4}+2\left(x^{3}\right)^{2}-x^{2}+35$ is $\ldots \ldots \ldots$

Without finding the cubes, factorise $(x-y)^{3}+(y-z)^{3}+(z-x)^{3} .$

Factorise :

$84-2 r-2 r^{2}$