SOLUTION: The first two rows of the following matrix are already in triangular form. Finish the job by performing Gaussian elimination on row 3. What are the contents of row 3 after you ha

Question 626978: The first two rows of the following matrix are already in triangular form. Finish the job by performing Gaussian elimination on row 3. What are the contents of row 3 after you have done so?
[1 6 -2 0]
[0 -3 1 5]
[2 0 3 9]
I really dont get this
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The first two rows of the following matrix are already in triangular form. Finish the job by performing Gaussian elimination on row 3. What are the contents of row 3 after you have done so?
[1 6 -2 0]
[0 -3 1 5]
[2 0 3 9]
-------
Subtract 2 times the 1st line from the 3rd line to get:

[1 6 -2 0]
[0 -3 1 5]
[0-12 7 9]
-----------------
Ans: [0 -12 7 9]
===========
Cheers,
Stan H.
===========

RELATED QUESTIONS
the first two rows of hte following matrix are already in trianular form. Finish the job... (answered by saliiim8)

The firstt two rows of the following matrix are already in triangular form. Finish the... (answered by stanbon)

1. What is the formula for the determinant of a 3 x 3 matrix ? A. B.... (answered by richard1234)

1. Write the augmented matrix for the given system: x + y + 2z = 6 3x + 2y + z =... (answered by Edwin McCravy)

x-z=-3 y+z=9 x+z=7 solve the following linear system by using gaussian reduction... (answered by greenestamps)

Gauss Jordan...Please Help A system of three linear equations in the variables x,y and (answered by fractalier)

Use Gaussian Elimination to reduce the augmented matrix for the following system of... (answered by stanbon)

The first painter can finish a paint job in 3 hours. The second painter can finish the... (answered by edjones)

You have been performing Gaussian Elimination, and now you have all of the lower... (answered by jim_thompson5910)