Find the intervals on which the given function is increasing and decreasing.

Question

y=-x^2-2x
y'=-2x-2
critical point
x=-1
Increasing
[-infinity,-1)
Decreasing
(-1,infinity]
is this the correct way of writting this wiht the brackets

Answer 1

you got it right.
good job.

Answer 2

so the parenthasis means including and the bracket means its open or how does this work