Posted by Barb on Thursday, January 31, 2013 at 2:05am.
mmmh, can't quite see how that helps
I would just do:
y = 1/x
sub into 2nd
x + 1/x = a
x^2 + 1 = ax
x^2 - ax + 1 = 0
x = (a ± √(a^2 - 4) )/2
y = 2/(a ± √(a^2 - 4) )
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