Chapter 2 Review

# Chapter 2 Review - 2x 3 7 do the same thing to all ≤ ≤ three parts to get the variable alone in the middle Write answers using interval

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Chapter 2 Review Rules for solving equations: 1. Perform operations necessary to get the variable by itself. 2. Whatever you do to one side of the equation, you must also do to the other side of the equation! To get rid of fractions, multiply both sides of the equation by the LCD (least common denominator) To solve a formula for a specified variable, use the rules for solving an equation to get that variable by itself. Rules for solving inequalities: Same as rules for solving equations, but when you multiply or divide by a negative number you must reverse the inequality symbol. For a compound inequality like 3

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Unformatted text preview: 2x + 3 7, do the same thing to all ≤ ≤ three parts to get the variable alone in the middle. Write answers using interval notation: x 2 ≤--> (- , 2] ∞ x < 2--> (- , 2) ∞ x 2 ≥--> [2, ) ∞ x > 2--> (2, ) ∞ 3 x 7 ≤ ≤--> [3, 7] 3 < x < 7--> (3, 7) Absolute Value Equations: |X | = a (if a is a positive number) means that X = a or X = -a |X | = |Y | means that X = Y or X = -Y Absolute Value Inequalities: |X | < a (if a is a positive number) means that-a < X < a |X | > a (if a is a positive number) means that X < -a or X > a...
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## This note was uploaded on 05/13/2011 for the course MTH 110 taught by Professor Helenius during the Spring '08 term at Grand Valley State University.

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Chapter 2 Review - 2x 3 7 do the same thing to all ≤ ≤ three parts to get the variable alone in the middle Write answers using interval

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