28-35

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Source: — Problem Solving |

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by mschling52 » Thu Aug 30, 2007 12:52 pm
Is it E - II and III?

Solve this like factoring a quadratic equation:

(x^2)(y^2) - xy - 6 = 0

(xy+2)(xy-3) = 0

So, xy = -2 or xy = 3. Therefore, y=-2/x or 3/x.

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by magical cook » Thu Aug 30, 2007 2:00 pm
Thank you ! the answer is E.