What does this mean

[true wyvern]

i have no clue what that means

[tawny python]

it means -infinity < x < -2

whatever number x you have is between -infinity and -2

[true wyvern]

that makes sense

but why is there a parentheses around negative infinity and not -2

[tawny python]

Its actually a typo

but the use of parentheses do make a difference sometimes

like

$x \in (-\infty, -2]$

[icy plover]

! Baby LaV.

[tawny python]

this would mean -infinity < x <= -2

x is greater than -infinity but less than or equal to -2

the use of [ ] means the endpoint is included

but the use of ( ) means the endpoint are not included

we can have a fusion too like the one I showed

the e like symbols is read "belongs to"

$x$: a number or variable\
$\in$: is in\
$(-\infty, -2)$: this interval (or so to say "range")

[icy plover]

! Baby LaV.

[true wyvern]

tysm

Im trying to prepare for algebra 2

[tawny python]

:)

oh ic

all the best

i can help u if you want, you can dm me

anytime

[true wyvern]

k