CPM Homework Help : CCA2 Problem 2-166

Use the technique of completing the square to express $y = x^2 − 5x + 7$ in graphing form and state the vertex.

Hint:

Write the expressions in their correct locations.

How many ones do you need to complete the square?
How many do you have?

More Help:

$x$ $-2.5x$ $x$ $-2.5$ $-2.5x$ $x^2$

2 by 2 square.

Added labels to the square: interior, bottom right, 6.25, right edge, + 0.75.