Question 951490
How do you mean for those requested values?  


{{{y=-x^2-4x-3}}}
{{{-(x^2+4x+3)}}}
{{{-(x^2+4x+4+3-4)}}}
{{{-((x+2)^2-1)}}}
{{{highlight_green(y=-(x+2)^2+1)}}}


The domain is all real numbers.
The range is {{{y<=1}}}.


Xmax and Xmin are meaningless.