SOLUTION: What should be added to x^2+y+y^2 to obtain 2x^2+3xy ?

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Question 255244: What should be added to x^2+y+y^2 to obtain 2x^2+3xy ?
Answer by palanisamy(496) About Me  (Show Source):
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What should be added to x^2+y+y^2 to obtain 2x^2+3xy ?
The required quantity =(2x^2+3xy)-(x^2+y+y^2)
= 2x^2+3xy-x^2-y-y^2
=x^2+3xy-y^2-y