Expand the following:

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

The following expressions are polynomials? Justify your answer:

$\frac{1}{2 x}$

Using suitable identity, evaluate the following:

$101 \times 102$

Factorise $: x^{3}-x^{2}-17 x-15$

State whether each of the following statements is true or false

The zero of polynomial $2 x+3$ is $\frac{3}{2}$.