Question 1126030

Let f (x) = x2 + 8x + 22.

Find the vertex. Answer: ________
State the range of the function. Answer: ________
On what interval is the function increasing? Answer: ________
<pre>x-coordinate of vertex: {{{matrix(1,9, x, "=", - b/(2a), "=", - 8/(2 * 1), "=", - 8/2, "=", - 4)}}}
y-coordinate of vertex: {{{matrix(1,7, y, "=", (- 4)^2 + 8(- 4) + 22, "=", 16 - 32 + 22, "=", 6)}}}
{{{highlight_green(matrix(1,6, "Vertex:", "(- 4,", "6)", and, "Range:", y >= 6))}}}
That's it!!