If x + y + z = 1,then 1-3x2 -3y2-3z2 + 2x3 + 2y3 +2z3 is equal to;(a) 6xyz (b) 3xyz (c) 2xyz (d) xyz
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routes when they rotate their heads. most species of birds have very flexible necks but owls are known to turn their heads up to 270. degrees around in each direction one. of the researchers dr. Philip Galliard said our research shows precisely.
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