all the books say |x|>a is written as x>a or X<-a  TOPIC_SOLVED

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all the books say |x|>a is written as x>a or X<-a

Postby nicknation on Wed Jun 24, 2009 4:52 pm

all the books say |x|>a is written as x>a or X<-a
why cant i rite it like -a>X>A?
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Postby stapel_eliz on Wed Jun 24, 2009 6:33 pm

Try plugging a value in for "a", and taking the "x" out of the middle. For instance, given |x| > 3, the books say:

. . . . .x < -3 or x > 3

Your form says:

. . . . .-3 > x > 3

...which, by making the above-mentioned change, is:

. . . . .-3 > 3

But is any negative number greater than any positive number? :lol:

So formatting your way leads to nonsensical statements. That's why you shouldn't do that. (Plus, your teacher will probably count off, maybe a lot....)

:wink:
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