The columns of Q were obtained by applying the Gram-Schmidt Process to the columns of A. Find the upper triangular matrix such that
Now I'm pretty sure that could someone please verify this and show what they got for thanks
Your candidate for will certainly imply that the equation holds. The columns being orthonormal (as they are, by inspection), implies that , and Those are differently sized identity matrices, of course.
What I don't know off-hand is whether your candidate is upper triangular. Why don't you post your calculations, and I'll verify those? (That's more in the spirit of this forum anyway!)