MA 153 Lesson 14 Outline Answering of homework questions over lesson 13. Lesson 14 Section 2.5 Other Types of EquationsAbsolute ValueExample: (a) 4x=(b) 413x+−=9Example: 3x=Square both sides: 29x=Solve for x: 3,3xx= −=is called an extraneous solution. 3x= −When you square both sides of an equation, you must check your answer(s) for extraneous solutions (extra solutions). Example: 3x=Cube both sides: 327x=Solve for x: 3x=When raising both sides of an equation to an odd power, there is no possibility for extraneous solutions.
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