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The quadrennial international congress of mathematicians was held in Beijing on 1 1 month 15, 2004.
Let two sides of a right triangle be A and B (A > B),

A+b=5。

a2+b2= 13，

① Square the two sides—② Get ab=6,

(a-b)2=(a+b)2-4ab= 1，

∴a-b= 1，

Honey, take it if you can. ..

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