SOLUTION: Perform in order (a), (b), and (c) on the augmented matrix. (a) R2= -2r1 + r2 (b) R3= -2r1 + r3 (c) R3= 6r2 + r3 [1 -3 -5 | -2] [2 -5 -4 | 5] [2 5 4 | 6]

Algebra ->  Matrices-and-determiminant -> SOLUTION: Perform in order (a), (b), and (c) on the augmented matrix. (a) R2= -2r1 + r2 (b) R3= -2r1 + r3 (c) R3= 6r2 + r3 [1 -3 -5 | -2] [2 -5 -4 | 5] [2 5 4 | 6]       Log On


   

Question 824992: Perform in order (a), (b), and (c) on the augmented matrix.
(a) R2= -2r1 + r2
(b) R3= -2r1 + r3
(c) R3= 6r2 + r3
[1 -3 -5 | -2]
[2 -5 -4 | 5]
[2 5 4 | 6]
Answer by jsmallt9(3758) About Me  (Show Source):
You can put this solution on YOUR website!

Now just do what it says:
r%5B2%5D=+-2r%5B1%5D+%2B+r%5B2%5D
means: Replace row 2 with the sum of (-2 times row 1) and row 2.
r%5B3%5D=+-2r%5B1%5D+%2B+r%5B3%5D
means: Replace row 3 with the sum of (-2 times row 1) and row 3.
r%5B3%5D=+6r%5B2%5D+%2B+r%5B3%5D
means: Replace row 3 with the sum of (6 times row 2) and row 3.