# 线性代数 示例

, ,

Move all of the variables to the left side of each equation.

Find the determinant of the coefficient matrix .

Write in determinant notation.

Choose the row or column with the most elements. If there are no elements choose any row or column. Multiply every element in column by its cofactor and add.

Consider the corresponding sign chart.

The cofactor is the minor with the sign changed if the indices match a position on the sign chart.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

Since the determinant is not , the system can be solved using Cramer's Rule.

Find the value of by Cramer's Rule, which states that .

Replace column of the coefficient matrix that corresponds to the -coefficients of the system with .

Find the determinant.

Choose the row or column with the most elements. If there are no elements choose any row or column. Multiply every element in column by its cofactor and add.

Consider the corresponding sign chart.

The cofactor is the minor with the sign changed if the indices match a position on the sign chart.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

Use the formula to solve for .

Substitute for and for in the formula.

Find the value of by Cramer's Rule, which states that .

Replace column of the coefficient matrix that corresponds to the -coefficients of the system with .

Find the determinant.

Choose the row or column with the most elements. If there are no elements choose any row or column. Multiply every element in row by its cofactor and add.

Consider the corresponding sign chart.

The cofactor is the minor with the sign changed if the indices match a position on the sign chart.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

Use the formula to solve for .

Substitute for and for in the formula.

Find the value of by Cramer's Rule, which states that .

Replace column of the coefficient matrix that corresponds to the -coefficients of the system with .

Find the determinant.

Choose the row or column with the most elements. If there are no elements choose any row or column. Multiply every element in row by its cofactor and add.

Consider the corresponding sign chart.

The cofactor is the minor with the sign changed if the indices match a position on the sign chart.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

The minor for is the determinant with row and column deleted.

Multiply element by its cofactor.

Use the formula to solve for .

Substitute for and for in the formula.

Mathway 需要 javascript 和现代浏览器。