HI there. I'm taking Linear Algebra classes right now and this question has been bugging me. 1. The problem statement, all variables and given/known data Find a general solution to the system, state the dimension of the solution space, and confirm the row vectors of A are orthogonal to the solution vectors. The given system is: (x1) + (x2) + (x3) = 0 2(x1) + 2(x2) + 2(x3) = 0 3(x1) + 3(x2) + 3(x3) = 0 3. The attempt at a solution This last part about confirming vectors are orthogonal (bolded) confuses me. I have found the general solution can be written as (x1) = t + s (x2) = t (x3) = s And that the dimension of the solution is 2, since there are two vectors. But I do not understand how to do the last part of the question. What is it asking? Any guidance would be appreciated.