Math Problem Statement

|2x + 1| > 5

Solution

To solve the inequality 2x+1>5|2x + 1| > 5, we can break it down into two separate cases because of the absolute value.

Step 1: Definition of absolute value inequality

For any expression A>B|A| > B, where B>0B > 0, this means: A>BorA<BA > B \quad \text{or} \quad A < -B In our case, A=2x+1A = 2x + 1 and B=5B = 5. Thus, the inequality becomes:

  1. 2x+1>52x + 1 > 5
  2. 2x+1<52x + 1 < -5

Step 2: Solve both cases

Case 1: 2x+1>52x + 1 > 5

Subtract 1 from both sides: 2x>42x > 4 Now, divide by 2: x>2x > 2

Case 2: 2x+1<52x + 1 < -5

Subtract 1 from both sides: 2x<62x < -6 Now, divide by 2: x<3x < -3

Step 3: Combine the solutions

The solution is: x>2orx<3x > 2 \quad \text{or} \quad x < -3

In interval notation, this is: (,3)(2,)(-\infty, -3) \cup (2, \infty)

Would you like more details or have any questions?


Related Questions:

  1. How do you solve absolute value inequalities where the inequality is \leq?
  2. What is the geometric interpretation of xa>b|x - a| > b?
  3. How do you handle inequalities with two absolute value terms?
  4. What is the difference between solving A>B|A| > B and A<B|A| < B?
  5. Can you explain how to graph the solution set of 2x+1>5|2x + 1| > 5?

Tip: Always check the boundary points when solving absolute value inequalities to ensure you don't miss any critical intervals.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value
Inequalities

Formulas

|A| > B means A > B or A < -B

Theorems

Absolute Value Inequality Theorem

Suitable Grade Level

Grades 9-10