SOLUTION: {{{9x^2+25y^2=46}}}, {{{xy=-1}}}. Find {{{3x+5y}}}

Question 123341: , . Find
Answer by Edwin McCravy(20059) (Show Source): You can put this solution on YOUR website!
, . Find


Notice that 

, so

, and since ,

, and since ,

, or

, or

. Taking square roots of both sides:

= �.

Edwin

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