Question

help in linear algebra please

Answer 1

With??

Answer 2

x-y+2z-w=-1
2x+y-2z-2w=-2
-x+2y-4z+w=1
3x -3w=-3

Answer 3

what's that/

Answer 4

i am doing it but i dont get the right answer,, somewhere im messing it up

Answer 5

matrices

Answer 6

linear algebra

Answer 7

where is the question?

Answer 8

solve

Answer 9

solve the linear equation by gauss-jordan elimination

Answer 10

jajajaja

Answer 11

commonnnn u guys are genious

Answer 12

this has something to do with determinants if you do matrixes

Answer 13

otherwise its just subbing like normal

Answer 14

i am not in determinant yet

Answer 15

elimination,,,

Answer 16

-2x+4y -4z+2w = 2
2x +y -2z -2w =-2
-------------------
5y -6z+0w = 0



x -y +2z -w = -1
-x +2y -4z +w =1
-------------------
y -2z +0w = 0


-3x +3y -6z +3w = 3
3x -3w =-3
--------------------
3y -6z +0w = 0

so far it "reduces" to this i think

Answer 17

-5y +10z = 0
5y -6z = 0
--------------
4z = 0 ; z=0

-3y +6(0) = 0 ; y=0

if its right ... been awhile on this many

Answer 18

x-w=-1; x = w-1


2(w-1)-2w=-2
2w -2 -2w=-2


-(w-1)+w=1
-w+1 +w=1


it appears to go wierd; but thats prolly the cobwebs talking

Answer 19

u solve two by two

Answer 20

1 0 0 -1 1
0 1 -2 0 0
0 0 0 0 0
0 0 0 0 -1

i dont think there is a solution

Answer 21

wolfram gets the same thing: http://www3.wolframalpha.com/input/?i=%28x-y%2B2z-w%3D-1%29+and+%282x%2By-2z-2w%3D-2%29+and+%28-x%2B2y-4z%2Bw%3D1%29+and%283x-3w%3D-3%29

Answer 22

x = w-1 and y = 2z

Answer 23

what do you have for an answer key? to chk with?

Answer 24

yes let me see

Answer 25

see your previous question anilorap :)

Answer 26

I started doing it manually but there are so many online calculators that do it and show all the steps ..

Answer 27

yes amistre64