Compute a×b\mathbf{a} \times \mathbf{b}a×b for a=⟨2,1,3⟩\mathbf{a} = \langle 2, 1, 3 \ranglea=⟨2,1,3⟩ and b=⟨1,−1,2⟩\mathbf{b} = \langle 1, -1, 2 \rangleb=⟨1,−1,2⟩.
⟨5,−1,−3⟩\langle 5, -1, -3 \rangle⟨5,−1,−3⟩
⟨−5,1,3⟩\langle -5, 1, 3 \rangle⟨−5,1,3⟩
⟨5,1,−3⟩\langle 5, 1, -3 \rangle⟨5,1,−3⟩
⟨1,−1,−3⟩\langle 1, -1, -3 \rangle⟨1,−1,−3⟩