Let S = {v1, v2, ..., vk} be a basis for the subspace W of Rn. Then a basis T for Rn that contains S can be found by applying the method of Example 5 to the vectors v1, v2, ..., vk, e1, e2, ..., en.
Find a basis T for R4 that contains the vectors v1 = [4 4 4 4] and v2 = [1 2 2 2].
A basis T for R4 that contains the vectors is given by {[4 4 4 4], [1 2 2 2], [ ]}.
(Use a comma to separate vectors as needed.)