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nikdorinn [45]
3 years ago
14

HELP ME please .. I really need it lol

Mathematics
2 answers:
lys-0071 [83]3 years ago
8 0

Answer:

C

Step-by-step explanation:

The absolute value function always returns a positive value

However, the expression inside the bars can be positive or negative

| 3 | = 3 and | - 3 | = 3, hence the solution of

| x | = 3 is x = ± 3

Extending this to

| x² - 4 | = 3, then

| x² - 4 | = 3 and | - (x² - 4) | = 3

x² - 4 = 3 ; - (x² - 4) = 3 → C

Dmitrij [34]3 years ago
6 0

Answer:

C

Step-by-step explanation:

|x^2-4|=3

Before we say what this implies, we need to know that |-1|=1 and |1|=1.

So what I'm saying is:

|-(x^2-4)|=|-1 \cdot (x^2-4)|=|-1| \cdot |x^2-4|

=|x^2-4|.

So |x^2-4|=3 implies:

(x^2-4)=3 or -(x^2-4)=3.

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