$a = \begin{pmatrix}3\\7\end{pmatrix}$ while $b = \begin{pmatrix}-2\\5\end{pmatrix}$.
(main)[2]
Calculate $a - 2b$.
Worked solution & mark scheme
This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct vector $\begin{pmatrix}7 \\ -3\end{pmatrix}$” …