Posted by landry on Thursday, March 21, 2013 at 12:23am.
(x-3)/(x+1) > 5
i solved and got x < -2
but this is not right once you plug it in. please help.
inequality- why is this wrong? - black_widow, Thursday, March 21, 2013 at 2:41am
it should be x>-3
inequality- why is this wrong? - Steve, Thursday, March 21, 2013 at 12:27pm
Not so. If x=-5/2, y=11/3 < 5
(x-3)/(x+1) > 5
if x > -1,
x-3 > 5(x+1)
x-3 > 5x+5
-8 > 4x
x < -2
but, we assumed x > -1, so that's a no-go
If x < -1,
x-3 < 5(x+1)
x-3 < 5x+5
-8 < 4x
x > -2
So, we have -2 < x < -1
inequality- why is this wrong? - black_widow, Friday, March 22, 2013 at 8:52am
opps sorry made some calculation mistakes....
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