1.1. Expand and simplify

$\frac{{(3-\sqrt{x})}^{2}}{x}$

giving each term in simplest form.

1.2. Use a non-calculator method to solve the equation

$128\sqrt{2}={2}^{a}$

to find the exact value of $a$.

Show the steps in your working clearly.

1.3. Write 

$\frac{x(2{x}^{4}-\sqrt{x})}{\sqrt{x}}$

in the form

$a{x}^{b}-{x}^{c}$

where $a$, $b$ and $c$ are constants to be found.