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Factorise:
(i) 4x^2 + 9y^2 + 16z^2 + 12xy – 24yz – 16xz=
(ii) 2x^2 + y^2 + 8z^2 – 2\sqrt{2}xy + 4\sqrt{2}yz – 8xz=
Answer variants:
(2x + 3y – 4z) (2x + 3y – 4z)
(2x - 3y – 4z) (2x -3y – 4z)
(−\sqrt{2}x + y + 2\sqrt{2}z) (−\sqrt{2}x + y + 2\sqrt{2}z)
(\sqrt{2}x + y + 2\sqrt{2}z) (\sqrt{2}x + y + 2\sqrt{2}z)
(−\sqrt{2}x -y + 2\sqrt{2}z) (−\sqrt{2}x -y + 2\sqrt{2}z)
(2x -3y +z) (2x -3y – z)