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Back in the happy days of high school, you may have encountered three special quadratics. We call them recycled quadratics, because the GMAC recycles - these quadratics appear in many algebra questions. Identifying them is often the key to a quick solution of a GMAT problem.Memorize these recycled quadratics:I (a+b)2 = a2+2ab+b2II (a-b)2 = a2-2ab+b2III (a+b)(a-b) = a2 - b2We'll discuss how to identify them and what to do when you do in the near future.
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