How do you solve this on matlab

I need help knowing how to get x1, x2 and x3 on matlab. I dont know how the code should look.

Answer 1

[Star Strider]

I would use the null function.

[Akhuemose Eigbobo]

could you show me how i would code that?

[Star Strider]

Please see the documentation that I linked to in my Answer. It has everything necessary to use the function (and describes it much better than I can).