exam Maths Puzzle Numerical Ability

Yah i know another icky work problem they always trip me up. can anyone plese assist me with this one. thank you
94. Demand for pools. Tropical pools sell an aboveground model

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exam Other Question

How do you solve this equation:

a(square)+ 2ab - c(square) - c (square) - 2cd - d (square)

I have typed (square) to suggest a to the power of 2.
Write (2x - 3) /(2x - 1) - 3x as a rational expression.