kenkensplaysv2 kenkensplaysv2
  • 15-12-2021
  • Mathematics
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Solve the absolute value equation. Select all that apply.
Please Show Work

Solve the absolute value equation Select all that apply Please Show Work class=

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LammettHash
LammettHash LammettHash
  • 15-12-2021

Recall the definition of absolute value:

[tex]|x| = \begin{cases} x & \text{if } x \ge 0 \\ -x & \text{if } x < 0 \end{cases}[/tex]

Then the equation

2 |x - 3| + 6 = 4

breaks down into two cases.

(1) If x - 3 ≥ 0, then |x - 3| = x - 3, and so

2 (x - 3) + 6 = 4

2 (x - 3) = -2

x - 3 = -1

x = 2

(2) If x - 3 < 0, then |x - 3| = -(x - 3), and so

-2 (x - 3) + 6 = 4

-2 (x - 3) = -2

x - 3 = 1

x = 4

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