I'm having trouble figuring out how to get solutions or really even get an augmented matrix correct. I'm working in xyz homework and I don't even know if there's a correct way you're supposed to input the information when you get the solution for a computer program rather than x=7 etc, maybe it's supposed to be (7,0) or something (hypothetical answer). Anyway, here's the equation:
Solve the following system of equations by using matrices.
[FONT=Times New Roman, Times, serif]{x+1 = 1
{3x-y= -13
(there's only one bracket, not two and I assume it means make an augmented matrix)
Here's what I did, except there's a line directly to the left of 1
-13 to make it augmented
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[FONT=Times New Roman, Times, serif]Then I added R2 to R1, new matrix
[/FONT]
[FONT=Times New Roman, Times, serif]Then, to get the top left number to be zero in R1, I multiplied R1 by 1/4, new matrix
[/FONT]
[FONT=Times New Roman, Times, serif]Then, I multiplied R2, columns 2 and 3 by -1, trying to get R2, column 2 to 1, new matrix
[/FONT]
[FONT=Times New Roman, Times, serif]But now I have no idea how to get the 3 to a zero and I don't even know if what I did was correct. Can someone point me in the right direction??
[/FONT]
Solve the following system of equations by using matrices.
[FONT=Times New Roman, Times, serif]{x+1 = 1
{3x-y= -13
(there's only one bracket, not two and I assume it means make an augmented matrix)
Here's what I did, except there's a line directly to the left of 1
-13 to make it augmented
[/FONT]
1 | 1 | 1 |
3 | -1 | -13 |
[FONT=Times New Roman, Times, serif]Then I added R2 to R1, new matrix
[/FONT]
4 | 0 | -12 |
3 | 1 | -13 |
[FONT=Times New Roman, Times, serif]Then, to get the top left number to be zero in R1, I multiplied R1 by 1/4, new matrix
[/FONT]
1 | 0 | -3 |
3 | -1 | -13 |
[FONT=Times New Roman, Times, serif]Then, I multiplied R2, columns 2 and 3 by -1, trying to get R2, column 2 to 1, new matrix
[/FONT]
1 | 0 | -3 |
3 | 1 | 13 |
[FONT=Times New Roman, Times, serif]But now I have no idea how to get the 3 to a zero and I don't even know if what I did was correct. Can someone point me in the right direction??
[/FONT]