### Home > CCAA8 > Chapter 9 Unit 10 > Lesson CCA: 9.1.2 > Problem9-21

9-21.

For each quadratic function below, use the idea of completing the square to write it in graphing form. Then state the vertex of each parabola.

1.  $f(x)=x^2+4x+5$

$f(x)=(x+2)^2+1$,
vertex: $(−2,1)$
1.  $f(x)=x^2−6x$