exam Maths Puzzle Numerical Ability

i totally dont understand this problem; (x-3/2)^2 * (1/x-3)^2
could someone may be explain how i should simplify it?

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exam Other Question

Kevin works 3 times as many hours in a week as Karen does. If each were to work 6h more per week, Kevin would be working twice as many hours as Karen does. How many hours does each work now? Find the number of combinations

C
6 4