Question

What's the range of x^2+2x-8

Answer 1

The range of a function is the set of its possible output values.

The range of x^2 + 2x - 8 is

`\begin{gathered} \lbrace y|y\ge-9\rbrace \\ \\ \end{gathered}`

In interval notation

[-9, ∞)

It's increasing on

(-1, ∞)

It is decreasing on

(-∞, -1)