### Home > A2C > Chapter 11 > Lesson 11.1.2 > Problem11-20

11-20.

Complete the square to convert each of the following quadratic functions to graphing form. State the vertex and sketch the graph.

1. $f\left(x\right) = x^{2} + 6x + 7a$

$f\left(x\right) = \left(x^{2} + 6x + 9\right) − 9 + 7$

$f\left(x\right) = \left(x + 3\right)^{2} − 2$

vertex: $\left(−3, −2\right)$

1. $f\left(x\right) = x^{2} − 10x$

See part (a).