CPM Homework Help : CCG Problem 1-29

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1-29.

Evaluate each expression below if $a=-2$ and $b=3$ .

$3a^2-5b+8$
Answer (a):
$\begin{array}{r} 3(-2)^2 - 5(3) + 8 \quad \;\;\; \\ 3(4) - 15 + 8 \quad \;\;\; \\ 12 - 15 + 8 \quad \;\;\; \\ -3 + 8 = 5 \end{array}$

$\frac{2}{3}b-5a$
Answer (b):
$\begin{array}{l} \frac{2}{3}\left(3\right)-5\left(-2\right)\\ 2-\left(-10\right)\\ 2+10=12 \end{array}$

$\frac{a+2b}{4}+4a$
Answer (c):
$-7$

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