Question

Evaluate the expression: 342- 2u + 9 when u = -3

Answer 1

ANSWER:

42

STEP-BY-STEP EXPLANATION:

We have the following expression:

$3u^2-2u+9$

We evaluate when u is equal to -3, as follows:

$\begin{gathered} 3\left(-3\right)^2-2\left(-3\right)+9 \\ \\ 3\cdot9+(2)(3)+9 \\ \\ 27+6+9=42 \\ \\ \text{ When u is equal to -3 the expression is equal to 42} \end{gathered}$