Math Help??

Question

solve the following system using matrices
2x+ y + z = 5
4x- y - 3z = 1
8x+ y - x = 5

Answer 1

2 1 1 5
4 -1 -3 1
8 1 -1 5 ---> add 1st to third row

2 1 1 5 ---> multiply by 3 and add to second row
4 -1 -3 1
10 2 0 10

6 3 3 15
10 2 0 16
10 2 0 10 ---> subtract 2nd row from 3rd row

6 3 3 5
10 2 0 16
0 0 0 -6

Now we have something of the form 0x + 0y + 0z = -6

Indeterminate and can not continue.

Did you copy the problem correctly?

Answer 2

2x+ y + z = 5
4x- y - 3z = 1
8x+ y - x = 5

first I invert the matrix :

1 0 0 | 2 1 1
0 1 0 | 4 -1 -3
0 0 1 |8 1 -1

geezz that is a lot of work for a monday night
i quit
ask someone else ...

Answer 3

cheese



I hate math

I♥DylanSprouse