Excessive complications may be adverse. E.g., if in the palindromic algo-
rithms the expression (a3 + 8c − 4ab) takes on zero or a near-zero value, this
will cause a fault or an error. The case of yCB or (yY FB + a/4) close to zero is
also unfavorable. Simple shifts of the roots seem more safe, provided that no
close values are subtracted.
A similar technique of shifts and hyperbolic transformations can be applied
to cubic equations as well.