2007-11-09 12:23:30 · 3 answers · asked by jared r 1 in Science & Mathematics ➔ Mathematics
The inequality changes if you multiply or divide by a negative.
We don't have to change the inequality.
Instead of < pretend it is = and solve
3x-6=0
3x=6
x=2
switch back
x<2
other side
3x-5=4
3x=9
x=3
switch back
x>4
"interval form"
Notes: 1. The included endpoint x = 5 is indicated with
a "bracket". [ ]
2. Parentheses are used when an endpoint is not included. ( )
3. The -(sideways 8) represents "negative infinity."
infinity looks like a sideways 8
negative infinity is - sideways 8
( negative infinity,2) or (4, infinity)
2007-11-09 12:56:05 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Hi,
3x-6<0
3x<6
x<2
3x-5>4
3x>9
x>3
Interval notation:
(-∞,2)U(3,∞)
FE
2007-11-09 13:04:41 · answer #2 · answered by formeng 6 · 0⤊ 0⤋
x<2
x>3
2007-11-09 12:37:07 · answer #3 · answered by UNIQUE 3 · 0⤊ 0⤋