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Angle through which the earth rotates = 2pi

Time to do so = 246060 = 86400s

Angular velocity = 7.3x10^-5rads^-1

Factorise: (x-2)(x+4)(x-1)

Set equal to 0: (x-2)(x+4)(x-1) = 0

Points are (2,0) (-4,0) (1,0)

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