The polynomial of degree 3 3 , P ( x ) P ( x ) , has

The polynomial of degree $3$, $P\left(x\right)$, has a root of multiplicity $2$ at $x=2$ and a root of multiplicity $1$ at $x=-1$. The $y$-intercept is  $y=-1.2$. 
Find a formula for $P\left(x\right)$. 
$P\left(x\right)=$    ,