Algebra & Equations
Cubic Real Root
A real root of a cubic via Newton's method.
Formula
Formula
ax3 + bx2 + cx + d = 0
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| a | cubic coefficient | real number (ℝ) | — | input |
| b | quadratic coefficient | real number (ℝ) | — | input |
| c | linear coefficient | real number (ℝ) | — | input |
| d | constant | real number (ℝ) | — | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givena = 1, b = -6, c = 11, d = -6
Result1
Example 2
Givena = 1, b = 0, c = 0, d = -8
Result2