Answer
Row reduce the matrix [v1, v2, v3]
0 0 4 = -2 8 -5
0 -3 -1 = 0 -3 -1
-2 8 -5 = 0 0 4
Work Step by Step
the matrix [v1, v2, v3] has a pivot in each row, so the columns of the matrix span R^3, by theorem 4. that is, {v1, v2, v3} span R^3