Math Problem Statement

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

x≤−6 or x≥4

−6≤x≤4

−6≥x≥−4

x≤−4 or x≥6

Solution

The absolute inequality given is:

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

To solve this, let's break it down:

  1. The definition of absolute value inequality states that:

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

    Applying this to our problem:

    2x+210or2x+2102x + 2 \leq -10 \quad \text{or} \quad 2x + 2 \geq 10

  2. Solving the first inequality 2x+2102x + 2 \leq -10:

    2x122x \leq -12 x6x \leq -6

  3. Solving the second inequality 2x+2102x + 2 \geq 10:

    2x82x \geq 8 x4x \geq 4

Thus, the solution to the inequality is:

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

This matches option 1: x6x \leq -6 or x4x \geq 4.

Would you like further details or explanations on any step?

Here are 5 related questions:

  1. How do you solve absolute value equations?
  2. What is the difference between solving AB|A| \geq B and AB|A| \leq B?
  3. Can you graph the solution of this inequality?
  4. What happens if the inequality sign was >> instead of \geq?
  5. How do you solve compound inequalities?

Tip: Always isolate the absolute value before applying the rules to split the inequality into two cases.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value
Inequalities

Formulas

|A| ≥ B implies A ≤ -B or A ≥ B

Theorems

Absolute Value Inequality Theorem

Suitable Grade Level

Grades 9-10