# problem in finding matrices

#### chk2

##### New member
hi!
I have a problem with the following question.

1.Give an example to matrix
$A\in M$
2(R) so that A2=0 and
$A\neq 0$
.
i dont know even how to start...

2. Give an example to 3 matrices
$A,B,C\in M$
2(R) that all thier limbs\neq0 so that AC=BC and
$A\neq B$
.

thanks!!