ANSWER:
42
STEP-BY-STEP EXPLANATION:
We have the following expression:
[tex]3u^2-2u+9[/tex]
We evaluate when u is equal to -3, as follows:
[tex]\begin{gathered} 3\left(-3\right)^2-2\left(-3\right)+9 \\ \\ 3\cdot9+(2)(3)+9 \\ \\ 27+6+9=42 \\ \\ \text{ When u is equal to -3 the expression is equal to 42} \end{gathered}[/tex]
