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
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]
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