Tuesday, July 26, 2011

GMAT Quant Favorites!!


A list of GMAT Favorites for Quick Reference
  • Special Quadratic Expressions
    1. x^2 - y^2 = (x+y)(x-y)
    2. x^2 + 2xy + y^2 = (x+y)^2
    3. x^2 + 2xy - y^2 = (x-y)^2

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