Question$=1$ $=2$ $\equiv 3$ $\equiv 4$ $=5$ 6 Español 7
Suppose that the functions $s$ and $t$ are defined for all real numbers $x$ as follo $$\begin{array}{l} s(x)=3 x^{2} \\ t(x)=x-4 \end{array}$$
Write the expressions for $(s \cdot t)(x)$ and $(s+t)(x)$ and evaluate $(s-t)(-3)$. $$\begin{array}{r} (s \cdot t)(x)=\square \\ (s+t)(x)=\square \\ (s-t)(-3)=\square \end{array}$$