Find $p(1), p(2)$ and $p(4)$ for each of the following polynomials

$p(t)=t^{2}-6 t+8$

Factorise the following:

$8 p^{3}+\frac{12}{5} p^{2}+\frac{6}{25} p+\frac{1}{125}$

Expand

$(3 a-4)^{2}$

Find the quotient and the remainder when $2 x^{2}-7 x-15$ is divided by

$x-2$

The following expressions are polynomials? Justify your answer:

$1-\sqrt{5 x}$

Factorise

$8 x^{3}-26 x^{2}+13 x+5$