# Chapter 9 - Quadratic Functions and Equations - 9-3 Solving Quadratic Equations - Mixed Review - Page 553: 64

#### Work Step by Step

The graph was made using graphing software. $y=x^2+5x+4$ $x=-b/2a$ $x=-5/2 = -2.5$ $y=x^2+5x+4$ $y=(-2.5)^2+5*(-2.5)+4$ $y=6.25-12.5+4$ $y=-2.25$ $(-2.5, -2.25)$ The green line is the axis of symmetry, and the vertex is labeled.

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