Matrix transformation of a 2×2 matrix

[mr_coffee]

Hello everyone, i don't know if i did this right or not because the answer isn't in the back of the book. Here is what i did:
http://show.imagehosting.us/show/898705/0/nouser_898/T0_-1_898705.jpg
Thanks!

 

[BerryBoy]

I'm afraid you've made a mistake in line 3.

You said that (j) = -w + 2i, because you've used w = (2,-1),
this is actually T(w).

You defined w on the second line as (1,1).

Hope this helps, let me know how you get/got on,
Sam

 

[mr_coffee]

ahh thank you! it worked out now!