$\"\"$

The function is $\"\"$ .

If $\"\"$ is a rational zero, then $\"\"$ is a factor of $\"\"$ and $\"\"$ is a factor of $\"\"$ .

Here, $\"\"$ and $\"\"$ .

Write the possible value of $\"\"$ in simplest form.

$\"\"$ and $\"\"$ .

$\"\"$

The possible rational zeroes are $\"\"$ and $\"\"$ .