All the lengths in this question are in centimetres. The diagram shows a shape $$\(A B C D E F\)$$ made from two rectangles. The total area of the shape is $$\(342 \mathrm{~cm}^{2}\)$$. Solve by factorisation. $$\[ x^{2}+x-72=0 \]$$ $$\(x=\)$$ ................ or $$\(x=\)$$ ................

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