Question

1. Perform Gauss-Jordan elimination on the augmented matrix shown.

O
-261
3
A. 0 1 -7
00 0
3
B. 0 -1 7
0
[102]
C.0 17
001
2370
[100]
D. 0 1 0
00

Answer 1

Explanation:

Isabella, do you know how to do the "elementary row operations"?

Also, when did they begin teaching linear algebra in H.S. :DDD nice work getting there.

Gauss Jordan, just mean get your matrix in RREF (Reduced Row Echelon Form)

I suggest using Matlab to do this. it's got the "RREF(x) function to do this exact thing.

Your teacher probably wants you to do this by hand. thou, huh. :/

here is my Matlab code and the answer

clc

close all

clear

format compact

A=[3 -4 2;0 -1 7]

mymatx=rref(A)

A =

3 -4 2

0 -1 7

mymatx =

1.0000 0 -8.6667

0 1.0000 -7.0000

Yes, maybe it's totally cheating, but it seems fair nowadays to use technology that is commonly available. :)

So answer A) looks right