solve a 2 /x-b 2 /y=0 a 2 b/x+b 2 a/y=a+b
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a 2/x =b 2/y
a 2y=b 2x (y=b2x/a2)
a2b/x+b2a/(b2x/a2)=a+b
a2b/x+a3/x=a+b
a2 (a+b)/x=a+b
x=a2
put x=a2 in y=b2x/a2
y=b2
a 2y=b 2x (y=b2x/a2)
a2b/x+b2a/(b2x/a2)=a+b
a2b/x+a3/x=a+b
a2 (a+b)/x=a+b
x=a2
put x=a2 in y=b2x/a2
y=b2
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