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Mathematics 6 Online
OpenStudy (anonymous):

Solve the absolute value inequality: |x - 4| > 2 x < 2 or x > 6 x > 2 or x < 6 x < -6 or x > 6 x > 2 and x < 6 I got x > 6 or < -2 But as you can see, that is not a choice, please help, thank you.

myininaya (myininaya):

If |f(x)|>2, this means f(x)>2 or f(x)<-2. If |f(x)|<2, this means -2<f(x)<2

myininaya (myininaya):

I'm saying f(x)=x-4 Just replace my f(x) above with x-4.

OpenStudy (anonymous):

Well think of the absolute value as parentheses for now and get x by itself so you would get absolute value of x > 6. So it would actually be answer C.

myininaya (myininaya):

No...

myininaya (myininaya):

Pretend if we just had |x|>2 This means what values of x have a distance from 0 greater than 2. Draw a number line if you think it helps. <---|-----|-------|------|-----|---> -4 -2 0 2 4 What number have a distance greater than 2 from 0? All the values less than -2 or greater than 2 will give you numbers that have a distance greater than 2 from 0. So that means if we had |x|>2 then x<-2 or x>2 based on what we just said in words. So if we have |f(x)|>2 this means we have f(x)<-2 or f(x)>2

OpenStudy (anonymous):

Can you break that down in a more simple way, because replacing X with F and stuff is really confusing me.

myininaya (myininaya):

Replace f(x) with x-4 not x with f |f(x)|>2 means f(x)>2 or f(x)<-2 |x-4|>2 means x-4>2 or x-4<-2

OpenStudy (anonymous):

Where does the f come to play in this?

OpenStudy (anonymous):

And I keep on getting the same answer :(

myininaya (myininaya):

f(x) is x-4 I put what |x-4|>2 means It means x-4>2 or x-4<-2 I think you aren't solving the second inequality right. You are adding 4 on both sides right? x-4>2 or x-4<-2 x-4+4>4+2 or x-4+4<-2+4

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