CPM Homework Help : CCA Problem 11-57

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11-57.

Solve each of the following equations or systems.

$x^2-1=15$
Hint (a):
How many solutions should you be looking for?
Answer (a):
$x=\pm4$

$\begin{aligned}[t] y = 3x - 2 \\ y = 4x + 3 \end{aligned}$

Hint (b):

Use the Equal Values method.
Make sure to solve for both $x$ and $y$ .

$x^2-2x-8=0$
Hint (c):
Factor and use the Zero Product Property.

$2x^2=-x+7$
Hint (d):
Start by setting the equation equal to $0$ .

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