M×n matrix with m linearly independent rows

[zohapmkoftid]

Homework Statement

Show that every m×n matrix A with m linearly independent rows can be obtained
from n × n matrix by deleting the last n − m rows.

Homework Equations

The Attempt at a Solution

I have no idea of this question

 

[micromass]

I don't really understand... Cant you just add n-m rows to the matrix. This yields a nxn matrix which fulfills are your desires...