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

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
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
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

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.

Page1 / 2

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

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online