Posted by Kelsie on Wednesday, August 17, 2011 at 1:54am.
sister age = s
cousin age = c
c - s = 26
c s = 560 so c = 560/s
560/s - s - 26 = 0
560 - s^2 - 26 s = 0
s^2 + 26 s - 560 = 0
solution is a complex number, no real solution is possible.
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