9 Fig. 9 shows a trapezium ABCD , with the lengths in centimetres of three of its sides.
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{754d34e4-2f47-48b7-9fbb-6caa7ac21eb7-3_464_878_347_632}
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\caption{Fig. 9}
\end{figure}
This trapezium has area \(140 \mathrm {~cm} ^ { 2 }\).
- Show that \(x ^ { 2 } + 2 x - 35 = 0\).
- Hence find the length of side AB of the trapezium.