exam Maths Puzzle Numerical Ability

x^3-2x^2-x+2 please help factor

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exam Other Question

A slow train leaves the station, 2 hrs later a fast train, with double the speed of the slow train, leaves the station and catches up with the slow train after traveling 180 mi. Find the speed of both trains. Please help me reduce this equation: {{ 5x-[-3x-(-2y+5x)-(10x-3y-4x)] }}}.
Also the -3y-4x has a bar above it.