# Chapter 4 Quadratic Functions and Factoring - 4.2 Graph Quadratic Functions in Vertex or Intercept Form - 4.2 Exercises - Mixed Review - Page 251: 57

5

#### Work Step by Step

We isolate x on one side of the equation to obtain: $$x-5 = 0 \\ x=5$$ Checking: $$5-5=0 \\0=0$$

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