SOLUTION: How do I find the Ymax, Ymin, Xmax, Xmin? At the moment I am trying to find the Ymax of y=-x^2-4x-3 Thank you

Question 951490: How do I find the Ymax, Ymin, Xmax, Xmin?
At the moment I am trying to find the Ymax of y=-x^2-4x-3
Thank you
Found 2 solutions by josgarithmetic, MathLover1:
Answer by josgarithmetic(39628) (Show Source): You can put this solution on YOUR website!
How do you mean for those requested values?

The domain is all real numbers.
The range is .

Xmax and Xmin are meaningless.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

here, you have a parabola and max or min is at vertex
write it in a vertex form where and are and coordinates of the vertex
...if parabola opens downward and has a max, and if parabola opens upward and has a min
....complete square

so, and and vertex is at (,)
then, max is at where

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