x-y=12and 1/x-1/y=3. How much is x*y Possibly answers -6,6,-4,4
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Given that x-y = 12 and 1/x -1/y = 3, we are to find x*y.
=> 1/x -1/y = 3
=> [xy/1] [1/x -1/y] = 12
=> (y - x) /xy = 3
=> 3xy = y - x
=> -3xy = x - y
=> -3xy...
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