Question

Which lists all the integer solutions of the equation |x| = 4? A. –4 and 4 B. 0 and 4 C. –4 only D. 4 only

Answer 1

@*Shadow*

Answer 2

This one is confusing

Answer 3

Do you know what absolute value is?

Answer 4

Not really

Answer 5

Lyrae, you got dis?

Answer 6

Yeah!

Answer 7

Well, it's actually quite simple.

It means that the value between the || are turned non negative.
So:
|4| = 4
|-4| = 4
|100| = 100
|-100| = 100

Or generally
|x| = x
|-x| = x

Answer 8

oh. So whatever is in the box, if its negative, outside the box its positive?

Answer 9

Yeah, exactly!

Answer 10

Cool, thanks, so would it be D?

Answer 11

@Lyrae

Answer 12

Nah, since the x is in the || and x can be any value positive or negative.

Answer 13

so it would be A

Answer 14

Yeah!

Answer 15

Thanks alot

Answer 16

I'll tag you if i have anymore problems

Answer 17

Yw! :)
Sure! I don't know how long I'll be online though... It's qute late here.

Answer 18

What time is it? And where are you

Answer 19

Australia and 2 AM?

Answer 20

Europe and 11pm?

Answer 21

Europe

Answer 22

Oh wow

Answer 23

11-2/3pm Time Frame?

Answer 24

?

Answer 25

But yeah, to get back on subject.
When you solve equations like |x| = 4. All you usually have to do is to replace the || by a
() and a -().

So
|x| = 4
solution
x = 4
-x = 4 => x = -4

Or if you have something slightly more complicated like
|x-4| = 10
the soultion would be
(x-4) = 10 => x = 14
-(x-4) = 10 => x = -6