Math Problem Statement

Solve the absolute inequality: |2x+2|≥102x+2≥10

 x≤−6 or x≥4 x≤-6 or x≥4

−6≤x≤4-6≤x≤4

 −6≥x≥−4-6≥x≥-4

Solution

Let's solve the absolute inequality step by step.

We are given:

2x+210|2x + 2| \geq 10

Step 1: Break the absolute value inequality

The general rule for absolute value inequalities is:

ABimpliesABorAB|A| \geq B \quad \text{implies} \quad A \geq B \quad \text{or} \quad A \leq -B

So, for 2x+210|2x + 2| \geq 10, we have two cases:

  1. 2x+2102x + 2 \geq 10
  2. 2x+2102x + 2 \leq -10

Step 2: Solve each inequality

Case 1: 2x+2102x + 2 \geq 10

2x1022x \geq 10 - 2 2x82x \geq 8 x4x \geq 4

Case 2: 2x+2102x + 2 \leq -10

2x1022x \leq -10 - 2 2x122x \leq -12 x6x \leq -6

Step 3: Combine the solutions

From the two cases, we have: x4orx6x \geq 4 \quad \text{or} \quad x \leq -6

Thus, the solution to the inequality is: x6orx4x \leq -6 \quad \text{or} \quad x \geq 4

Step 4: Verify your options

Looking at the provided options, the correct one is:

x6orx4x \leq -6 \quad \text{or} \quad x \geq 4

This matches the inequality solution.


Do you want more details or have any questions? Here are some related questions to explore:

  1. How do you solve absolute value inequalities in general?
  2. What happens if the inequality was 2x+210|2x+2| \leq 10?
  3. How would the solution change if the inequality sign was strict (i.e., 2x+2>10|2x+2| > 10)?
  4. Can you graph the solution x6 or x4x \leq -6 \text{ or } x \geq 4?
  5. What is the difference between absolute value equations and inequalities?

Tip: When solving absolute value inequalities, always split the inequality into two cases, one for the positive and one for the negative side of the absolute value.

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Math Problem Analysis

Mathematical Concepts

Absolute Value Inequality
Inequalities
Linear Equations

Formulas

|A| ≥ B implies A ≥ B or A ≤ -B

Theorems

Absolute Value Inequality Theorem

Suitable Grade Level

Grades 9-11