Question

Part 1: Explain, in complete sentences, which method you would use to solve the following system of equations. Part 2: Explain why you chose that method. Part 3: Provide the solution to the system. x–3y+4z=–9; 2x+y+3z=6; x–4y+3z=–9

Answer 1

1. I'd choose matrices.
2. Because it's easier
3. Find a pencil and piece of paper

Answer 2

I'm not good with matrices. I just need the first step for elimination.

Answer 3

It's much more difficult to do without matrices. Why would you want to put yourself through such torture?

Answer 4

There are a couple of ways to do it with elimination. Neither of which I recommend.

Answer 5

I didn't learn matrices.

Answer 6

Correctly learn them in any case.

Answer 7

The problem is, even if someone wanted to explain, they would explain it to you and you might get lost in the steps. You might not even be able to understand the steps.

Answer 8

That's the entire reason why I failed my way through Algebra 2 twice.

Answer 9

You failed Algebra II twice? How did you manage that?

Answer 10

If you failed something twice, you need to put more effort into self study.

Answer 11

First time I had a ridiculously horrendous teacher. He was fired. The second time my teacher couldn't work with my learning method so I went ignored.

Answer 12

What learning method?

Answer 13

Are you doing online school?

Answer 14

Yes. I have a solid B.

Answer 15

You have to learn matrices. It's the only way.

Answer 16

How do you suggest I learn them?

Answer 17

I'm not exactly sure how you would learn them actually. But you have to.

Answer 18

I don't have the time or patience to do it. And there was a time when I didn't know and no one would help me. I ended up having to learn on my own.

Answer 19

I even looked for videos on YouTube and their explanations only confused me more.

Answer 20

But there was one thing that helped. It helped me. I don't know if it will help you.

Answer 21

Here:

http://www.gregthatcher.com/Mathematics/GaussJordan.aspx

Answer 22

Thank you Hero

Answer 23

Do you at least know how to set up the matrix?

Answer 24

No, but I'm finding out now.

Answer 25

Basically you start with a 3 x 4 matrix

Answer 26

Let me set it up for you

Answer 27

okay

Answer 28

\[\left[ \begin{ matrix } 1 & 3 & 4 & -9 \\ 2 & 1 & 3 & 6 \\ 1 & -4 & 3 & -9 \end{ matrix } \right] \]

Answer 29

I don't know why that's not working

Answer 30

Basically just type in the numbers in the equations

Answer 31

1 –3 4 –9
2 1 3 6
1 –4 3 –9
Like that?

Answer 32

Yeah, but it has to be done like this: