Mathematics 0580 · IGCSE · Algebraic manipulation

Algebraic manipulation — practice question

The matrices are $A = \begin{pmatrix} 3 & 4 \\ 5 & 0 \end{pmatrix}$ and $B = \begin{pmatrix} 1 & 4 \\ -3 & 2 \end{pmatrix}$.

(a)[1]

Find the value of $5A$.

(b)[1]

Find the value of $A + B$.

(c)[2]

Find the value of $AB$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$\begin{pmatrix}15&20\\25&0\end{pmatrix}$ ” …