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216 is the only cube that can be written in this way?
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2020-03-20, 14:35
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enzocreti
Mar 2018
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216 is the only cube that can be written in this way?
216=3^2*(182^2-331*10^2)
is there any other positive cube that can be written as
a^2*(b^2-r*10^2)?
with a and b positive and coprime, r prime?
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