# Matrix of minors

Each element of a matrix has a minor. The **minor** is the determinant of a smaller matrix cut from the original matrix. We can find a **matrix of minors** by finding the minor for each element of a matrix.

To find the minor of element *i, j* in a 3 X 3 matrix *M*, remove row *i* and column *j* of the matrix. The determinant of the resulting 2 X 2 matrix is the minor of element .

We can find the minor of a 2 X 2 matrix in a similar fashion. To find the minor of element *i, j*, remove row *i* and column *j*. The remaining scalar is the determinant. In the case of a 2 X 2 matrix, this determinant is the minor.

## Getting ready

We're going to implement a helper ...

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