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Advanced Gmat Book, Chapt 6, pg 168, #22

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zachswenson
 Post subject: Advanced Gmat Book, Chapt 6, pg 168, #22
 Post Posted: Mon Jul 04, 2011 3:28 pm 
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Course Students


Posts: 1
Instructions: Factor according to the Quadratic Templates

22. 4x2 - 12x + 9y2 (the two's after the variables are exponents)

The In-Action Problem solution says the answer is (2x-3y) squared.

But 2x-3y squared, the difference of a square, and a quadratic template, has two variables in the middle term and the solution provided in the In-Action answer key does not (it only has x).

Have I missed something or is this a mistake?
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jnelson0612
 Post subject: Re: Advanced Gmat Book, Chapt 6, pg 168, #22
 Post Posted: Thu Jul 14, 2011 11:49 am 
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ManhattanGMAT Staff


Posts: 1857
You are right; the middle term should be 12xy. Good catch!

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Jamie Nelson
ManhattanGMAT Instructor
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