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## Homework Statement

The matrix is:

-2 -2 -4 4

-1 1 2 -2

-1 0 -3 0

-4 1 -7 -2

I know the dimensions for the null space are 2

## Homework Equations

I know that to find the basis for a null space Ax=0, so I row reduced it and I got

1 0 3 0

0 1 5 -2

0 0 0 0

0 0 0 0

## The Attempt at a Solution

Since I got this matrix, I thought the basis for the null space would be

-3 and 0

-5 2

1 0

0 1

but my computer keeps saying it is wrong. Can someone tell me what I'm doing wrong?