1. heathernelly

2. heathernelly

@jim_thompson5910 do you know how to do this? :)

3. heathernelly

@Luis_Rivera can you help me pleasee

4. nubeer

you have to find the X matrix right?

5. heathernelly

hmm i'm not sure

6. heathernelly

do you want me to tell you the choices?

7. nubeer

umm ok..

8. heathernelly

9. heathernelly

10. heathernelly

11. heathernelly

12. jim_thompson5910

|dw:1366763725969:dw|

13. jim_thompson5910

first multiply the scalar 2 by the matrix 2 -8 -4 2 to get 2*2 -8*2 -4*2 2*2 4 -16 -8 4 so we now have this |dw:1366763853215:dw|

14. jim_thompson5910

your next step is to subtract this matrix you just got from both sides |dw:1366763918364:dw|

15. jim_thompson5910

doing that will cancel out these matrices on the left side |dw:1366763994359:dw| since they add or subtract to the zero matrix

16. jim_thompson5910

so this is what we have now |dw:1366764038495:dw|

17. jim_thompson5910

I'll let you finish up

18. heathernelly

thank you soooo much!!!! i understand now :)

19. jim_thompson5910

ok great, tell me what you get for the matrix X

20. heathernelly

was just finishing up stuff, but i got 0 5 5 -6

21. jim_thompson5910

you nailed it, nice work