Question

[ 1 2 -3 0]
[ 2 1 -3 0]
[-1 1 0 0]
how do i row reduce this?

Answer 1

-2R1 +R2 = new R2
R1+R3 = new R1
new R1 + new R2 = newer R2

try that, you will be almost done...

Answer 2

that just gave me [ 0 0 0 0]
[ 0 0 0 0]
[-1 1 00]