Question

Identify the range of the equation y = −x2 − 8x − 10.


All real numbers

y ≥ −2

y ≤ 6

y ≤ −4

Answer 1

since this is a parabola that opens down the range will be from minus infinity up to the second coordinate of the vertex.
the first coordinate of the vertex is \(-\frac{b}{2a}\); in your case it is \(-\frac{-8}{2\times -1}=-4\)
the second coordinate is what you get when you replace \(x\) by \(-4\)

Answer 2

thanks

Answer 3

yw