Characteristic polynomial calculator

How to use this calculator

Edit the matrix after char. The starter has roots 2 and 4.

Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.

Try it here

Interactive tools require JavaScript. You can read the guide and example without it.

What to know

The polynomial-variable convention matters. Roots are eigenvalues, not the individual entries in general.

Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.