A polynomial root as raw data (no display state, no Solution class).
fraction is the rational part, root the radical part (a zero Root when
there is none). exact is faithful to the contract: true for an exact
rational or a quadratic irrational carried by an index-2 Root, false for a
Cardan / bisection (floating) value. multiplicity is always >= 1.
A polynomial root as raw data (no display state, no Solution class).
fractionis the rational part,rootthe radical part (a zero Root when there is none).exactis faithful to the contract: true for an exact rational or a quadratic irrational carried by an index-2 Root, false for a Cardan / bisection (floating) value.multiplicityis always >= 1.