3.39: Quadratic graph: coefficients and inequality

The diagram shows the graph of $y = h(x)$ where $h(x) = a(x + b)(cx + d)$ and $a$, $b$, $c$ and $d$ are integers. The curve meets the $x$-axis at $(-2, 0)$ and $(1.5, 0)$ and the $y$-axis at $(0, 12)$.