Polynomial solver (cubic)
One real root of ax³+bx²+cx+d by Newton.
Calculator
How to use
Cubic
Not all roots guaranteed.
Educational use only. For assessments, show reasoning and check boundary cases.
One real root of ax³+bx²+cx+d by Newton.
Not all roots guaranteed.
Educational use only. For assessments, show reasoning and check boundary cases.
Model / formula
Cubic: one real root (numerical)
Result
One real root ≈ 0.618034 (Newton, ax³+bx²+cx+d=0)