Y = (xy+yz)2−2x2y2z When x=−1,y=1 and z=2, |Y| = ___

1.	Y = (xy+yz)2−2x2y2z When x=−1,y=1 and z=2, \|Y\| = ___
Answer» Y = $(x y + y z)^{2} - 2 x^{2} y^{2} z$ When $x = - 1, y = 1$ and $z = 2$ , \|Y\| = ___

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