nim_rod007 Posted October 14, 2006 Share Posted October 14, 2006 This is a QC question: Col A: (2x + 3y)^2 Col B: 4x^2 + 6xy + 9y^2 I thought the answer was C, but PP seems to think it is D. Isn't this a simple plynomial problem?? Quote Link to comment Share on other sites More sharing options...
ravindra_babu Posted October 14, 2006 Share Posted October 14, 2006 This is a QC question: Col A: (2x + 3y)^2 Col B: 4x^2 + 6xy + 9y^2 I thought the answer was C, but PP seems to think it is D. Isn't this a simple plynomial problem? (2x + 3y)^2 = 4x^2 + 12xy + 9y^2 Col A: 12xy Col B: 6xy D is the right answer! Quote Link to comment Share on other sites More sharing options...
daageep Posted October 14, 2006 Share Posted October 14, 2006 ravindra_babu is right. you're comparing 12xy to 6xy. while 12xy looks bigger than 6xy, what happens if x=0? they are equal. what if x and y are 100? column a is bigger. a contradiction, so D. Quote Link to comment Share on other sites More sharing options...
nim_rod007 Posted October 14, 2006 Author Share Posted October 14, 2006 My bad!!! You're both right. Quote Link to comment Share on other sites More sharing options...
Skl Posted October 16, 2006 Share Posted October 16, 2006 Its 'D'. Sasi Quote Link to comment Share on other sites More sharing options...
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