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Mathematics
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OpenStudy (herpderp):
http://prntscr.com/cop6gn
How is the answer all real numbers?
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OpenStudy (lannyxx):
|2s -7| >= -1
Do you know how to work with absolute values?
OpenStudy (herpderp):
Yes
OpenStudy (lannyxx):
Easiest way I think is to just square both sides and get rid of it, but I hope someone here will come and show you rules to deal with it otherwise.
OpenStudy (mhchen):
Absolute value of anything is greater, or equal to 0. So it will NEVER be negative.
OpenStudy (herpderp):
exactly
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OpenStudy (herpderp):
So isn't it supposed to be no solution?
OpenStudy (lannyxx):
so it's like saying: whatever s you put, it will ALWAYS BE GREATER THAN -1
563blackghost (563blackghost):
No its `definitely all real numbers.`
OpenStudy (lannyxx):
the whole thing is always greater that's why the solution is all real numbers cuz whatever real number you put in there won't change that fact
OpenStudy (herpderp):
yeaaaah that's the answer xD I don't know how it is though
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OpenStudy (herpderp):
oh
OpenStudy (herpderp):
wait I get it; thanks
OpenStudy (lannyxx):
when it is said that all real numbers are the solution they just mean any number that is not imaginary will work
OpenStudy (herpderp):
I was being d u m b
OpenStudy (lannyxx):
you're fine
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563blackghost (563blackghost):
Nicely explained @LannyXX :)
OpenStudy (lannyxx):
thank you!
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