exam Maths Puzzle Numerical Ability

can you help me with this i do not understand it.

factor completely

x^2 - 6wy + 3xy - 2wx

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exam Other Question

Two cyclists begin traveling in the same direction on the same bike path. One travels at 15 miles per hour and the other travels at 12 miles per hour. When will the cyclists be 10 miles apart? write an algebraic expression for the expression:

sec[arcsin(x-1)]