Matrix Multiplication Problem

hi all

cant solve this one, doesnt seem too tricky though! thanks

View attachment 30355
Please tell us ,in addition, the mathematical definition of nullspace as it relates to matrices.

Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem.
 
HI ALL, IVE TRIED THE MULTIPLICATION TIP AS ADVISED, BUT NOT SEEMING TO GET ANYWHERE WITH IT
 
HI ALL, IVE TRIED THE MULTIPLICATION TIP AS ADVISED, BUT NOT SEEMING TO GET ANYWHERE WITH IT
Please show us your work and exactly where you decide that it is not going anywhere.
 
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