Answer to Question #169664 in Linear Algebra for william

Question

solve the following question.

[ 2 6 7 ] [ -12 ]

[ -1 4 8 ] [ 6 ]

[ 3 -2 -5 ] [ -8 ]

a. R2 <=> R3

b. -1\2 R3

c. -4 R2 + R1 -> R1

d. -1\2 R1 + R2 -> R2

Answer 1

a.

[2 6 7][-12]

[3 -2 -5][ -8 ]

[-1 4 8][ 6 ]

b.

[2 6 7 ][ -12]

[-1 4 8 ][ 6 ]

[-1.5 1 2.5][ 4 ]

c.

[6 -10 -25 ][ -36]

[-1 4 8 ][ 6 ]

[ 3 -2 -5 ][ -8 ]

d.

[2 6 7][ -12 ]

[ -3 1 9/2][ 12 ]

[ 3 -2 -5][ -8]