Let and be vectors in . Find a point such that are the vertices of a right triangle.

We choose to be a point such that is orthogonal to (so we have a right angle). So,

The choices of and are arbitrary, so let’s take , then we have . Therefore is a solution.

the vector formed by (A-B)=(-1,3,5), right? Why in the resolution the results is “(-1,3,-5)”, correct me if I’m wrong please, I’m VEEEEEEERY confused.