Precalculus Examples

$f (x) = - 2 {(x + \frac{4}{5})}^{2} - 8$

Step 1

Use the vertex form, $y = a {(x - h)}^{2} + k$ , to determine the values of $a$ , $h$ , and $k$ .

$a = - 2$

$h = - \frac{4}{5}$

$k = - 8$

Step 2

Find the vertex $(h, k)$ .

$(- \frac{4}{5}, - 8)$

Step 3