We can use distribution property to multiply the polynomial by the monomial.
$$ \begin{aligned} \color{blue}{4p^2} \cdot \left( 3p^2-9 \right) &= \color{blue}{4p^2} \cdot 3p^2 + \color{blue}{4p^2} \cdot \left( -9\right) = \\ &= 12p^4-36p^2 \end{aligned} $$