= d With A = 29, B= 20, U = A.B 580, let J be (-290.. 290]. There is a ring-iso g:ZAXZB → Zu sending (a,0) to (Ga+HB), using magic numbers G= EJ and H= EJ. A L... J mod-U root of poly f(x) = 20-[x+10]³+ 29.[x -2] is (..... )4 .. L.. EJ.

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