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# Characteristic Polynomial Calculator

This calculator computes characteristic polynomial of a square matrix. The calculator will show all steps and detailed explanation.

Characteristic polynomial calculator (shows all steps)
show help ↓↓ examples ↓↓
Input matrix
working...
examples
example 1:ex 1:
What is the characteristic polynomial of $A = \left[ \begin{array}{cc} 3 & \frac{5}{2} \\ -2 & 4 \end{array} \right]$.
example 2:ex 2:
Find the characteristic polynomial of the matrix $A = \left[ \begin{array}{cc} 4 & 2 & -5 \\ -3 & 2 & 6 \\ 0 & 0 & 4 \end{array} \right]$.
example 3:ex 3:
Compute characteristic polynomial $A = \left[ \begin{array}{cc} -1 & 2 & 4 & 1 \\ 5 & 3 & 1 & 1 \\ 3 & 7 & 9 & 3 \\ 2 & -1 & 2 & 4 \end{array} \right]$.

## How to input matrix ?

### 1: Input matrix starting from the upper left-hand corner.

 Example: To input matrix: $\left[ \begin{array}{cc} -7 & 1/4 \\ -1.3 & -2/5 \end{array} \right]$ type

### 2: You don't need to enter zeros.

 Example: To input matrix: $\left[ \begin{array}{ccc} 0 & 1 & 0 \\ -1 & 0 & 0 \\ 0 & 0 & 2/3 \end{array} \right]$ type

### 3: You can copy and paste matrix from excel in 3 steps.

 Step 1: Copy matrix from excel Step 2: Select upper right cell Step 3: Press Ctrl+V

### 5: To delete matrix

 Select whole matrix and click delete
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