SOLUTION: Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form (x1, x2, x3, x4). x1 − 3x2 − 2x3 + x4 = −2 −2x1 + 7x2 + x3 − 2x4 = �

Question 1140461: Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form
(x1, x2, x3, x4).

x1 − 3x2 − 2x3 + x4 = −2
−2x1 + 7x2 + x3 − 2x4 = −3
3x1 − 7x2 − 3x3 + 3x4 = −2
5x1 + x2 + 4x3 − 2x4 = 16

Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

your matrix:

Find the pivot in the 1st column in the 1st row:

Eliminate the 1st column:

Find the pivot in the 2nd column in the 2nd row:

Eliminate the 2nd column:

Make the pivot in the 3rd column by dividing the 3rd row by :

Eliminate the 3rd column

Make the pivot in the 4th column by dividing the 4th row by :

Eliminate the 4th column:

Solution set:

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