### QC Questions & Algebra

Lesson by Mike McGarry
Magoosh Expert

Summary
The lesson focuses on strategies for tackling quantitative comparison (QC) questions on the GRE, particularly those involving algebraic expressions and patterns.
• Emphasizes the importance of understanding algebraic patterns such as the square of a sum, the square of a difference, and the difference of two squares.
• Illustrates through practice problems how to apply these patterns to solve QC questions effectively.
• Advises on multiplying both quantities by the same positive number, simplifying algebraic expressions, and the significance of recognizing perfect squares.
• Highlights the necessity of remembering to include the plus or minus sign when taking the square root of a variable squared.
• Stresses the importance of understanding inequalities and basic rules to deduce the relationship between two quantities.
Chapters
00:01
Algebraic Patterns in QC Questions
02:31
Strategies for Simplifying Expressions
04:41
Recognizing and Applying Algebraic Patterns
06:23
The Importance of the Plus or Minus Sign
07:53
Understanding Inequalities and Basic Rules