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May 25, 2015

Homework Help: math logic

Posted by steph on Sunday, December 3, 2006 at 1:17pm.

I need to find 5 or more ordered pairs (x,y)



In which xy = x + y


like (0,0) and (2,2)

0,0
2,2
1/2,-1
-1,1/2





i need one more

How about two different x's and y''s?

(2,3) = 1,5)

this is the problem: xy= x+y
or the product of xy equals the sum of x and y.

example: x= .5 and y= -1

where x times y equals -0.5 and x plus y also equals -0.5.

i need one more example so far I have:

(0,0)
(2,2)
(1/2,-1)
(-1,1/2)

xy= x+y ---->

xy - x = y --->

x(y-1) = y ---->

x = y/(y-1)

Take e.g. y = 9/10 ---> x = -9

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