# How do you write the quadratic in vertex form given y= x^2 - 12x + 20 ?

$\left(- \frac{b}{2} a\right) = - \frac{12}{2} = 6$
$f \left(- \frac{b}{2} a\right) = f \left(6\right) = 36 - 72 + 20 = - 16$
Factored form:$f \left(x\right) = {\left(x - 6\right)}^{2} - 16$
Develop f(x) = (x^2 - 12x + 36 - 16 = x^2 - 12x + 20. Correct