Question

its about elementary row operation. please help me to solve tis equation.

consider A=[312]
[212]
[625]
by applying elementary row operation (ero) to an augmented matrix, obtain the inverse of A.

thanks...............its urgent..........

Answer 1

if it is really urgent the answer is at the bottom of the link
http://www.wolframalpha.com/input/?i= {3%2C1%2C2}%2C{2%2C1%2C2}%2C{6%2C2%2C5}

Answer 2

have to copy and paste

Answer 3

You have to augment it next to the identity matrix and row reduce it to obtain an inverse

Answer 4

if one exists

Answer 5

now, is your question about what elementary row operations are and how to use them?