The diagram shows a trapezium.
The lengths of three of the sides of the trapezium are `x − 5, x + 2` and `x + 6`.
All measurements are given in centimetres.
The area of the trapezium is `52` cm².
By first showing that `x2 − x − 72 = 0`, or otherwise, solve the equation and find the possible value(s) of `x`.
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